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SIEMENS 3-Phase Current Monitoring Relay: Current Monitoring Relay, 3-Phase Phase - Current Monitoring Relays
SiemensCurrent Monitoring Relays

SIEMENS 3-Phase Current Monitoring Relay: Current Monitoring Relay, 3-Phase Phase

The SIEMENS 3-Phase Current Monitoring Relay is a current monitoring relay designed for three-phase systems. It includes over and under current monitoring capabilities, with a current range of 4 A to 40 A. This…

SKU 3G-OTH-28783

Brand
Siemens
Item
3-Phase Current Monitoring Relay: Current Monitoring Relay, 3-Phase Phase
Category
Current Monitoring Relays
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Technical Specifications

Siemens
Manufacturer Part Number
3RR22421FW30
Type
4 A – 40 A
Phase
3-Phase
Includes
Over and Under Current Monitoring
Product Type
Current Monitoring Relay
Phase Configuration
3-Phase
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS 3-Phase Current Monitoring Relay is a current monitoring relay designed for three-phase systems. It includes over and under current monitoring capabilities, with a current range of 4 A to 40 A. This device is identified by manufacturer part number 3RR22421FW30.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the SIEMENS 3RR22421FW30 current monitoring relay used for?

The SIEMENS 3RR22421FW30 is a 3-phase current monitoring relay used to protect motors and industrial equipment by detecting overcurrent and undercurrent conditions. It is commonly applied in manufacturing, HVAC, and pumping systems to prevent damage from phase imbalance or load faults.

What are the specifications of the SIEMENS 3RR22421FW30?

The SIEMENS 3RR22421FW30 is a 3-phase current monitoring relay with a current range of 4 A to 40 A. It includes both over and under current monitoring. The manufacturer part number is 3RR22421FW30, and it is designed for three-phase systems.

Where to buy the SIEMENS 3RR22421FW30 worldwide?

You can source the SIEMENS 3RR22421FW30 current monitoring relay through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

How to install the SIEMENS 3RR22421FW30 current monitoring relay?

Install the SIEMENS 3RR22421FW30 by mounting it on a DIN rail, connecting the three-phase supply through the relay's current transformers, and wiring the output contacts to your control circuit. Always follow the manufacturer's manual for proper settings and safety isolation.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens current monitoring relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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