Please be advised, WIN SOURCE will be having the National Day from October 1st to October 6th.

During this period, we still accept your inquiries and orders, but all the shipments will be delayed until October 7th.

Sorry for any inconvenience caused. Happy National Day!

Protection Relays & Systems : 117 Products

Protection relays and systems are vital for safeguarding electrical circuits and equipment from faults such as overcurrent, voltage irregularities, and short circuits. These devices ensure the stability and safety of power systems by detecting abnormalities and automatically triggering protective actions.

Modern protection relays come with advanced features like real-time monitoring, fault diagnosis, and communication capabilities, making them integral to smart grid and industrial automation solutions.

Prominent manufacturers like ABB, Siemens, and GE provide a comprehensive range of protection relays and systems, ensuring the highest level of electrical safety and reliability.

Select Images Part Number Mfr Description Datasheet Availability Price Qty RFQ Rohs ECAD Model

Mfr. Part No.
SE-135-10

WS Part No.
1272460-SE-135-10

Littelfuse Inc.

GF-GC MON 18-72 VDC USES SE-TA12
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-330AU-00-01

WS Part No.
1272405-SE-330AU-00-01

Littelfuse Inc.

NEUTRAL-EARTHING-RESISTOR MONITO
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-330HV-20-01

WS Part No.
1272390-SE-330HV-20-01

Littelfuse Inc.

NGR MONITOR HV LVPS NC K4
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-330-27-00

WS Part No.
1272435-SE-330-27-00

Littelfuse Inc.

MONITOR NGR 48V FBR/RJ45 61850
Datasheet

Low Stock
Available

MOQ:1

Mfr. Part No.
SE-330HV-25-01

WS Part No.
1272394-SE-330HV-25-01

Littelfuse Inc.

MONITOR NGR HV 48V DUAL SC FBR
Datasheet

Low Stock
Available

MOQ:1

Mfr. Part No.
SE-330HV-23-01

WS Part No.
1272393-SE-330HV-23-01

Littelfuse Inc.

NGR MONITOR HV LVPS ETHERNET NC
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-330HV-04-00

WS Part No.
1272399-SE-330HV-04-00

Littelfuse Inc.

NGR MON HV UNIV E-NET SC FIBER R
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-325SN

WS Part No.
1272449-SE-325SN

Littelfuse Inc.

NGR MON EXTENDED RF TRIP NON-LAT
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-330-28-00

WS Part No.
1272437-SE-330-28-00

Littelfuse Inc.

MONITOR NGR 48V DUAL FBR 61850
Datasheet

Low Stock
Available

MOQ:1

Mfr. Part No.
SE-325ESN

WS Part No.
1272446-SE-325ESN

Littelfuse Inc.

NGR MON 240 VAC EXT RF NON-LATCH
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-325ET

WS Part No.
1272447-SE-325ET

Littelfuse Inc.

NGR MON 240 VAC GF TIME 0.1-5S
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-330HV-07-01

WS Part No.
1272403-SE-330HV-07-01

Littelfuse Inc.

NGR MON UNIV SC FIBER RJ45 61850
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-325T

WS Part No.
1272452-SE-325T

Littelfuse Inc.

NGR MONITOR 120 VAC GF TIME 0.1-
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-325SNT

WS Part No.
1272450-SE-325SNT

Littelfuse Inc.

NGR MON 120 VAC EXT RF GF TIME 0
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-325DST

WS Part No.
1272456-SE-325DST

Littelfuse Inc.

NGR MON 120VAC/VDC EXT RF GF 0.1
Datasheet

Low Stock
Available

MOQ:1

rohs

Mfr. Part No.
SE-135-XGC-00

WS Part No.
1272459-SE-135-XGC-00

Littelfuse Inc.

MONITOR GRD-FAULT GRD-CHK RELAY
Datasheet

Low Stock
Available

MOQ:1

Mfr. Part No.
SE-325ST

WS Part No.
1272451-SE-325ST

Littelfuse Inc.

NGR MON EXTENDED RF TIME GF 0.1-
Datasheet

Low Stock
Available

MOQ:1

rohs