Relays – Erik Prayoga

Littelfuse SE-330-08-01 NGR Monitor, Dual SC Fiber, IEC 61850, NC

Erik Prayoga — Mon, 22 Jun 2026 17:45:36 +0000

The Littelfuse SE-330-08-01 is a Neutral Grounding Resistor (NGR) Monitor / protection relay designed for resistance-grounded AC systems. With a universal supply of 65–265 VAC and 85–275 VDC and IEC 61850 communication over dual SC fiber, this SE-330 model provides continuous NGR monitoring, ground-fault detection and shorted-NGR supervision for substations, industrial power distribution and utility switchgear.

Key Features

Continuous NGR monitoring to detect resistor degradation or failure.
Shorted NGR and ground-fault detection to identify bypassed or excessive fault currents.
Adjustable pickup sensitivity (2–100 %) in 1% steps for precise coordination.
Adjustable trip/time delay (0.1–10 s) for selectivity and system coordination.
Universal CT compatibility with programmable output contacts and selectable contact operating modes.
Analog 4–20 mA output and pulsing output (SE-330 only); IEC 61850 communication via dual SC fiber.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330-08-01
Component	Neutral Grounding Resistor Monitor
Supply Voltage	65–265 V AC / 85–275 V DC (universal)
Adjustable Pickup	2–100 % (1 % increments)
Time Delay	0.1–10 s (adjustable)
Analog Output	4–20 mA
Digital/Comm	IEC 61850 over dual SC fiber
CT Compatibility	Universal CT input
Outputs	Programmable output contacts; pulsing output (SE-330)

Applications

Protection of neutral grounding resistors in medium-voltage distribution, ground-fault detection in utility substations, NGR supervision for industrial power plants and backup/main protection in switchgear and transformer neutral monitoring.

We supply genuine Littelfuse protection relays through authorized channels from our Batam base, with fast delivery across Indonesia and Southeast Asia. Contact us for availability and request a quotation — competitive lead times and local support for your project.

Littelfuse SE-330HV-21-01 NGR Monitor HV LVPS DeviceNet

Erik Prayoga — Mon, 22 Jun 2026 17:45:36 +0000

Part number Littelfuse SE-330HV-21-01 is a conformally coated Neutral Grounding Resistor (NGR) monitor built for resistance-grounded AC systems. It offers selectable supply voltage options (28–52 VDC and 36–72 VDC), adjustable sensitivity and ground-fault trip timing, continuous NGR and ground-fault detection, DeviceNet communications and configurable relay outputs. This protection relay is suited to substations, industrial power distribution, generator neutral supervision and motor-control protection applications.

Key Features

Conformal-coated module for enhanced corrosion and contamination resistance in harsh environments.
Continuous monitoring detects NGR shorts and ground faults to reduce transient overvoltage risk.
Adjustable pickup 2–100% (1% increments) for precise sensitivity and false-trip avoidance.
Ground-fault trip delay adjustable 0.1–10.0 s for coordination with upstream protection.
Analog 4–20 mA output plus an optional pulsing output (SE-330 models) for remote monitoring and integration.
DeviceNet communications with programmable relay outputs; selectable fail-safe or non fail-safe operation.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330HV-21-01
Component	Neutral Grounding Resistor Monitor (NGR monitor)
Supply voltage (options)	28–52 VDC; 36–72 VDC
Adjustable pickup	2–100% (1% steps)
Ground-fault trip delay	0.1–10.0 s
Analog output	4–20 mA
Pulsing output	Pulsing output (SE-330 models)
Communications	DeviceNet
CT compatibility	Universal CT compatibility
Coating	Conformal coating
Other features	Standard harmonic filtering; RF trip level options; programmable relay outputs; selectable fail-safe/non fail-safe
Reset options	Range of reset options

Applications

Used for neutral-ground monitoring in resistance-grounded networks, substation ground-fault protection, industrial power distribution panels, generator neutral supervision, and integration into motor control centres and switchgear communications.

All Littelfuse SE-330HV-21-01 units are genuine and supplied through authorized channels. Deddy Susanto operates from Batam and offers fast delivery across Indonesia and Southeast Asia. Contact us to request a quotation, confirm availability and arrange technical support.

Littelfuse SE-330-08-00 NGR Monitor, Dual SC Fiber, IEC 61850

Erik Prayoga — Mon, 22 Jun 2026 17:45:35 +0000

The Littelfuse SE-330-08-00 is a Neutral Grounding Resistor (NGR) monitor designed for protection and continuous supervision of resistance-grounded AC systems. This IEC-capable protection relay supports universal AC/DC supply voltages (65–265 VAC / 85–275 VDC), offers IEC 61850 and USB communications, and provides RF-trip detection for systems up to and above 5 kV. Ideal for substation neutral monitoring, generator neutrals and industrial motor/transformer protection.

Key Features

Continuous NGR monitoring with shorted-resistor detection
Selectable contact operating modes: fail-safe or non-fail-safe; latching or autoreset
Flexible I/O: 2 Form A or 2 Form C programmable outputs
Communications: USB and IEC 61850 for integration with modern protection systems
Adjustable pickup (2–100 %) and adjustable trip delay (0.1–10 s) for coordination
Analog 4–20 mA output and pulsing output (SE-330 models) plus conformal coating for harsh environments

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330-08-00
Component	Neutral Grounding Resistor Monitor
Supply Voltage	65–265 VAC; 85–275 VDC
Contacts	2 Form A or 2 Form C (programmable)
Communications	USB, IEC 61850
RF Trip Level	20–2000 V (systems ≤5 kV); 100–10000 V (systems >5 kV)
Adjustable Pickup	2–100 %
Time Delay	0.1–10 s
Analog Output	4–20 mA
Additional Features	Conformal coating, pulsing output (SE-330 only), universal CT compatibility

Applications

Used for neutral grounding supervision and ground-fault detection in power distribution substations, industrial plants with resistance-grounded systems, generator/transformer neutral protection, and as main or backup detection in utilities and heavy industry.

We supply genuine Littelfuse protection relays through authorized channels. Based in Batam, we offer fast delivery across Indonesia and Southeast Asia, competitive pricing, and expert product support. Contact us to request a quotation or technical information for the SE-330-08-00.

Littelfuse SE-330HV-21-00 NGR Monitor, High Voltage, DeviceNet

Erik Prayoga — Mon, 22 Jun 2026 17:45:35 +0000

The Littelfuse SE-330HV-21-00 is a Neutral Grounding Resistor (NGR) monitor / protection relay engineered for resistance-grounded AC systems. With 28–52 VAC or 36–72 VDC supply capability and adjustable ground-fault pickup (2–100% of CT primary) plus trip time 0.1–10 s, it provides continuous NGR monitoring and ground-fault protection for utilities, substations, industrial motor control, and low-voltage power systems (LVPS). DeviceNet and USB communications make integration with PLC/SCADA and protection schemes straightforward.

Key Features

2 Form A (NO) and 2 Form C (changeover) relay contacts for programmable outputs and alarms.
Selectable fail-safe or non-fail-safe operating mode and conformal coating for harsh environments.
Wide supply range: 28–52 VAC or 36–72 VDC; front-panel and remote N.O. contact reset options.
Adjustable pickup (2–100% of CT primary) and adjustable trip delay (0.1–10.0 s) for coordination.
Communications: DeviceNet and USB for configuration, monitoring and integration; analog 4–20 mA output for process systems.
Detects shorted NGR conditions, ground faults on the neutral, and includes standard harmonic filtering and universal CT compatibility.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330HV-21-00
Component	Neutral Grounding Resistor Monitor (NGR monitor)
Supply Voltage (AC)	28–52 V AC
Supply Voltage (DC)	36–72 V DC
Relay Outputs	2 Form A (NO), 2 Form C (changeover)
Reset	Front-panel and remote N.O. contact reset
Communications	DeviceNet, USB
Analog Output	4–20 mA
Pulsing Output	Yes (SE-330 series pulsing output)
Adjustable Pickup	2–100% of CT primary (1% increments)
Trip Time / Delay	0.1–10.0 seconds
CT Compatibility	Universal CT compatibility
Protection / Coating	Conformal coated for harsh environments; harmonic filtering

Applications

Continuous NGR monitoring and ground-fault detection in resistance-grounded distribution systems; neutral protection on transformers and generators; protective and backup monitoring in substations, industrial plants, mining sites and LV distribution networks.

We supply genuine Littelfuse protection relays through authorized channels from our Batam base, with fast delivery across Indonesia and Southeast Asia. For availability, lead time and competitive pricing, contact us to request a quotation or technical assistance.

Littelfuse SE-330-07-00 NGR Monitor, SC Fiber & RJ45, IEC 61850

Erik Prayoga — Mon, 22 Jun 2026 17:45:34 +0000

The Littelfuse SE-330-07-00 is a conformally coated neutral grounding resistor (NGR) monitor / protection relay designed for resistance-grounded AC systems. This SE-330-series device (SE-330-07-00) supports universal supply voltages (65–265 VAC, 85–275 VDC), adjustable ground-fault pickup from 2–100% of CT primary and a 12 s trip time. Ideal as a neutral grounding relay or protection relay for medium-voltage distribution, generators, industrial plants and utility switchgear with IEC 61850 communication options.

Key Features

Conformal coating for harsh industrial environments and pollution resistance.
2 Form A (N.O.) and 2 Form C (changeover) programmable output contacts.
Universal supply: 65–265 VAC and 85–275 VDC; front-panel or remote N.O. contact reset.
Adjustable pickup 2–100% (1% steps) and adjustable time delay (0.1–10 s) for coordination.
Communications: USB and IEC 61850; analog 4–20 mA output and pulsing output (SE-330 only).
Detects shorted NGR, resistor failure and ground faults that bypass the resistor; harmonic filtering and latching or autoreset options.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330-07-00
Component	Neutral Grounding Resistor Monitor (NGR monitor / protection relay)
Contacts	2 Form A (N.O.) + 2 Form C
Supply Voltage	65–265 VAC; 85–275 VDC (universal)
Ground-fault pickup	Adjustable 2–100% of CT primary (1% increments)
Time delay / Trip time	Adjustable 0.1–10 s; trip time indicated 12 s
RF trip levels	20–2000 V (systems ≤5 kV); 100–10000 V (systems >5 kV)
Analog output	4–20 mA
Communications	USB, IEC 61850
Features	Conformal coating, harmonic filtering, latching or autoreset, pulsing output (SE-330)

Applications

Use SE-330-07-00 for continuous NGR monitoring in medium-voltage distribution, generator neutral protection, industrial plant and utility switchgear, and as backup sensing for transformer neutral resistor systems.

We supply genuine Littelfuse protection relays via authorized channels. Based in Batam, we ship quickly across Indonesia and Southeast Asia with competitive lead times. Contact us to request a formal quotation or for technical sales assistance on SE-330-07-00.

Littelfuse SE-330-07-01 NGR Monitor, SC Fiber & RJ45, IEC 61850, NC

Erik Prayoga — Mon, 22 Jun 2026 17:45:34 +0000

The Littelfuse SE-330-07-01 is a Neutral Grounding Resistor (NGR) monitor relay designed for resistance‑grounded AC system protection. This SE‑330 series protection relay supports selectable contact operating modes and wide supply options for AC and DC systems, providing continuous NGR monitoring, shorted‑resistor detection and ground‑fault indication. It is ideal for substation protection, distribution networks and industrial motor control where reliable NGR and protection relay functionality (IEC/utility applications) is required.

Key Features

Continuous NGR monitoring with fast detection of resistor faults and shorted NGR conditions.
Selectable contact configurations (1 Form A, 1 Form B, 2 Form C) with fail‑safe or non fail‑safe operation.
Adjustable sensitivity (pickup 2–100 %) and programmable time delay (0.1–10 s) for coordination.
Universal CT compatibility plus programmable output contacts, including analog 4–20 mA and pulsing output.
Flexible communications: fiber and RJ45 interfaces and support for IEC 61850 protocols.
Auto or manual reset options and selectable contact operating modes to match protection schemes.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330-07-01
Product	Neutral Grounding Resistor Monitor (NGR monitor)
Supply Voltage	65–265 V (AC); 85–275 VDC
Contact Configurations	1 Form A; 1 Form B; 2 Form C
Operating Modes	Fail‑safe / Non fail‑safe; selectable contact operating mode
Pickup (Sensitivity)	Adjustable 2–100 %
Time Delay	Adjustable 0.1–10 s
Outputs	Programmable contacts; analog 4–20 mA; pulsing output (SE‑330)
Communications	Fiber, RJ45, IEC 61850
CT Compatibility	Universal CT compatibility
Reset	Auto / Manual
Application	Resistance‑grounded AC system protection, NGR monitoring

Applications

Used for neutral grounding resistor monitoring in substations, distribution feeders and industrial power systems; protection and alarm for NGRs in generator and transformer neutrals; integration into SCADA/IEC 61850 protection schemes.

We supply genuine Littelfuse SE‑330-07-01 units through authorized channels from our Batam base. Fast delivery across Indonesia and Southeast Asia, competitive pricing, and local support available—contact us to request a quotation or technical assistance today.

Littelfuse SE-330-06-01 NGR Monitor, Dual RJ45, IEC 61850, NC

Erik Prayoga — Mon, 22 Jun 2026 17:45:33 +0000

Littelfuse SE-330-06-01 is a neutral grounding resistor (NGR) monitor engineered for resistance-grounded AC systems. With a universal 65–265 VAC / 85–275 VDC supply, analog 4–20 mA output and IEC 61850-capable communications, it delivers continuous NGR and ground-fault protection for substations, generators, industrial plants and process-control systems as an NGR monitor / protection relay. Features include dual RJ45 ports, pulsing output and adjustable pickup and delay for coordination.

Key Features

Continuous NGR and ground-fault monitoring with fast detection of resistor failures
Adjustable sensitivity 2–100 % in 1 % increments for precise pickup
Programmable relay outputs and selectable operating modes for system coordination
Analog 4–20 mA output plus pulsing output for auxiliary monitoring
Dual RJ45 ports and IEC 61850 support for substation-grade communications
Conformal-coated electronics and universal CT compatibility for harsh environments

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330-06-01
Component	Neutral Grounding Resistor Monitor (NGR Monitor)
Supply Voltage	Universal 65–265 VAC / 85–275 VDC
Analog Output	4–20 mA
Adjustable Pickup	2–100 % (1 % steps)
Adjustable Time Delay	0.1–10 s
Communication	Dual RJ45 ports, IEC 61850
CT Compatibility	Universal CT compatibility
Coating	Conformal coating for increased durability
Outputs	Programmable relay outputs; pulsing output; analog 4–20 mA

Applications

Typical uses include supervision of neutral grounding resistors on utility and industrial distribution feeders, ground-fault protection for generators and switchgear, and primary or backup NGR protection in petrochemical, mining and manufacturing plants.

We supply genuine Littelfuse SE-330-06-01 units through authorized channels from our Batam base, with fast delivery across Indonesia and Southeast Asia. Contact us for competitive lead times, fast response and product support — request a quotation today to specify communications or output options.

Littelfuse SE-330-06-00 NGR Monitor, Dual RJ45, IEC 61850

Erik Prayoga — Mon, 22 Jun 2026 17:45:33 +0000

The Littelfuse SE-330-06-00 is a Neutral Grounding Resistor (NGR) monitor and protection relay for resistance-grounded AC systems. Supplied 65–265 V AC / 85–275 V DC, it offers continuous NGR monitoring, ground-fault and shorted-NGR detection, programmable outputs and IEC 61850/Ethernet communications for integration with protection schemes in substations, switchgear and industrial power distribution.

Key Features

Continuous monitoring of neutral grounding resistor with conformal-coated electronics.
Detects shorted NGR and neutral ground-faults; reduces transient overvoltage risk.
Adjustable pickup 2–100% (1% steps) and adjustable trip delay; GF trip time 0.1–10.5 s.
Programmable outputs (2 Form A or 2 Form C); selectable fail-safe or non-fail-safe modes.
IEC 61850 support, dual RJ45 Ethernet, USB configuration and 4–20 mA analog output.
Universal CT compatibility and pulsing output (SE-330 models) for fast resistor-failure detection.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330-06-00
Component	Neutral Grounding Resistor Monitor (NGR Monitor)
Supply Voltage	65–265 V AC / 85–275 V DC (universal)
Contact Configuration	2 Form A or 2 Form C (programmable)
Reset Options	Front-panel switch or remote N.O. contact
Operating Modes	Fail-safe or non-fail-safe selectable
Communications	IEC 61850, dual RJ45 Ethernet, USB
Analog Output	4–20 mA
Adjustable Pickup	2–100% (1% increments)
Ground-Fault Trip Time	0.1–10.5 s (adjustable)
RF Trip Levels	20–2000 V (systems ≤ 5 kV); 100–10000 V (systems > 5 kV)
RF Trip Time	12 s
Coating	Conformal coating
CT Compatibility	Universal CT compatible
Special Output	Pulsing output (SE-330 models)

Applications

Used for neutral resistor monitoring and protection in medium-voltage substations, power plants, industrial distribution boards, mining installations and utility feeders — provides main or backup detection of ground faults and resistor failures, and integrates with SCADA via IEC 61850.

We supply genuine Littelfuse SE-330-06-00 units through authorized distribution channels. Deddy Susanto (Batam) stocks and ships across Indonesia and Southeast Asia with competitive pricing and fast delivery. Contact us to request a quotation or confirm stock and lead time for your project.

Littelfuse SE-330AU-08-00 NGR Monitor, Dual SC Fiber, IEC 61850

Erik Prayoga — Mon, 22 Jun 2026 17:45:32 +0000

The Littelfuse SE-330AU-08-00 is a Neutral Grounding Resistor (NGR) monitor and earth-fault relay designed for resistance-grounded AC systems. With a wide supply range (65–265 V AC / 85–275 V DC), USB and IEC 61850 Dual SC fiber communications, and selectable RF trip thresholds, it continuously supervises neutral current, neutral-to-earth voltage and NER integrity. Ideal for low- and medium-voltage transformers, generators, substation protection and industrial distribution networks requiring IEC 61850 integration.

Key Features

Continuous monitoring of neutral current, neutral-to-earth voltage and neutral-earthing resistor (NER) resistance.
Fail-safe relay outputs: 2 Form A (normally open) and 2 Form C (changeover).
Wide supply voltage: 65–265 V AC and 85–275 V DC for flexible installation.
Communications: USB port plus IEC 61850 over Dual SC fiber for substation integration.
Reset options via front-panel switch or remote N.O. contact; supports standard harmonic filtering.
Selectable RF trip levels for systems up to 5 kV and for systems above 5 kV to suit varied installation voltages.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330AU-08-00
Component	Neutral Grounding Resistor Monitor / Earth-fault relay
Supply Voltage	65–265 V AC; 85–275 V DC
Communications	USB; IEC 61850 (Dual SC Fiber)
Relay Contacts	2 Form A (NO) and 2 Form C (changeover)
Reset Type	Front-panel switch or remote N.O. contact
RF Trip Level	20–2000 V (systems ≤ 5 kV); 100–10000 V (systems > 5 kV)
Monitoring Functions	Neutral current, neutral-to-earth voltage, neutral-to-earth resistance (NER)
Suitable System Voltage	Low- and medium-voltage resistance-grounded AC systems
Revision	New revision available; older revision discontinued

Applications

NER supervision and earth-fault detection on transformers and generators; resistance-grounded distribution feeders; substation protection with IEC 61850 communication; industrial plants and utilities requiring continuous NER integrity checks.

We supply genuine Littelfuse protection relays through authorized channels. Based in Batam, Deddy Susanto delivers across Indonesia and Southeast Asia with responsive lead times and competitive pricing. Contact us to request a quotation or discuss integration and delivery options.

Littelfuse SE-330AU-08-01 NGR Monitor, Dual SC Fiber, IEC 61850, NC

Erik Prayoga — Mon, 22 Jun 2026 17:45:32 +0000

The Littelfuse SE-330AU-08-01 is a Neutral Grounding Resistor Monitor (NGR monitor) designed for continuous supervision of neutral-earthing resistors in resistance-grounded AC systems. With wide supply inputs (65–265 VAC / 85–275 VDC), IEC 61850 and USB communications, and adjustable trip level/time settings, it provides reliable earth-fault detection for low- and medium-voltage transformers, generator neutrals and distribution protection applications that require proven NER integrity verification.

Key Features

Continuous monitoring of neutral current, neutral-to-earth voltage and neutral-to-earth resistance.
Detects open or failed neutral-earthing resistor (NER) to prevent loss of earth-fault protection.
Wide supply voltage support: 65–265 VAC and 85–275 VDC for flexible installation.
Communication options include IEC 61850 and USB for integration and setup.
Front-panel switch and remote N.O. contact reset plus fail-safe operation for secure response.
Standard conformal coating and harmonic filtering plus adjustable trip level and time settings.

Technical Specifications

Manufacturer	Littelfuse
Commercial Reference	SE-330AU-08-01
Component	Neutral Grounding Resistor Monitor (NGR monitor)
Supply Voltage	65–265 VAC / 85–275 VDC
System Type	Resistance grounded AC systems
Communications	IEC 61850, USB
Reset	Front-panel switch / remote N.O. contact reset
Protection / Coating	Standard conformal coating; harmonic filtering included
Functions	Neutral current, neutral-earth voltage and neutral-earth resistance monitoring; adjustable trip/time settings

Applications

Use for NGR monitoring on low- and medium-voltage transformers, generator neutral supervision, distribution substations, industrial power systems and critical plant feeders where earth-fault detection and NER integrity are required.

We supply genuine Littelfuse protection relays through authorized distribution channels from our Batam base, with fast delivery across Indonesia and Southeast Asia. Competitive lead times and local support—contact us to request a quotation or technical assistance for SE-330AU-08-01 installations.