424K1105 Synchronism Check Relay, China 424K1105 Synchronism Check Relay Manufacturers, Suppliers, Factory

Overview

Place of Origin:	Sweden
Brand Name:	ABB
Model Number:	424K1105
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Specifications

Parameter	Value
Part Number	424K1105
Module Type	Synchronism Check Relay
Rated Voltage	25 V
Function	Synchronism check with dead-bus and dead-line options
Maximum Continuous Rating	140 Vac, 50/60 Hz
Output Contacts	2 Form C
Time Delay	1–15 s (adjustable)
Burden	2 VA, 1.0 power factor
Output Contact Rating	125 VDC: 30 A closing, 5 A continuous, 1 A opening (resistive), 0.3 A opening (inductive)
Vector Difference Voltage Adjustment	0–80 V
Pickup Time Delay	0.1–1.5 s (adjustable)
Dropout Time	1 cycle
Operating Temperature	-20 °C to +70 °C
Seismic Capability	>6 g ZPA, biaxial multi-frequency vibration (ANSI/IEEE C37.98)
Transient Immunity	>2500 V, 1 MHz bursts at 400 Hz repetition (ANSI C37.90.1)
Dielectric Strength	2000 Vac RMS, 60 seconds (all circuits to ground)
Dead Bus / Dead Line Levels	0–120 V adjustable (factory set 30 V for 25 V type)

Description

424K1105 relay is used to verify that the voltages on either side of a circuit breaker are synchronized, and in the proper phase and magnitude relationship to allow automatic closing. 424K1105 Type 25V provides the same functions, but also includes options to allow closing when either the line or the bus is dead. A switch is provided on the front panel of the relay to allow easy selection of the option most suitable system operating conditions. The options provided are: sync check only; high bus-dead line; high line-dead bus; high bus-dead line or high line-dead bus. The sync check function is active on all positions of the function switch. Both types include precise solid state measuring circuitry and time delay circuitry with calibrated, adjustable controls.

Applications

Thermal power plants: Used for safety verification during generator grid connection.

Self-owned power plants (large paper mills, chemical plants): Ensure phase consistency between the internal power grid and the external main power grid during switching.

Substation areas: Responsible for closing control in dual-busbar systems or ring network power supply systems.

Hydropower plants: Cooperate with the speed control system for automatic grid connection operations.

Competitive Advantage

Flexible settings

Low burden

Continuously rated coils

Seismic capability to 6g ZPA

Built-in test

Drawout construction

2 year warranty

UL recognized

FAQ

Q: How do I adjust the action delay of the 424K1105?
A: Set the "Allowable Closing Window Time" via the fine-tuning knob on the module panel or side. It's usually 0.1s - 1s.

Q: Can I close the circuit directly without using the 424K1105 relay?
A: Extremely dangerous. Asynchronous closing could cause the motor rotor to break or a large transformer to explode.

Q: Can a regular voltage relay be used to replace the faulty 424K1105 relay?
A: No. Synchronization checks require comparing both phase difference and frequency difference; regular voltage relays lack this logic.

Q: What if the PT signal is normal but the 424K1105 relay doesn't show synchronization?
A: This may be due to aging of the internal phase angle detection circuit. It's recommended to contact a professional for waveform comparison testing.

Q: Why is the indicator light of 424K1105 constantly on but there's no output signal?
A: Please check the fuses in the output circuit or check for any unresolved alarms in the interlocking logic.