ABB 1MYN569697-E TCS Trip Circuit Supervision Relay

Description

ABB 1MYN569697-E TCS Trip Circuit Supervision Relay

The ABB 1MYN569697-E is a high-reliability Trip Circuit Supervision (TCS) Relay, often referred to as a SPER series relay in some regions. Its primary function is to continuously monitor the integrity of a circuit breaker’s trip circuit in power distribution and transmission systems.

Product Detailed Description

The 1MYN569697-E is designed to detect any faults in the trip circuit—such as loss of auxiliary supply, wire breakage, or contact failure—while the circuit breaker is in either the “Open” or “Closed” position. By providing real-time monitoring, it ensures that when a protection relay issues a trip command, the breaker is actually capable of clearing the fault.

Technical Parameters

Product Advantages

• Comprehensive Monitoring: Unlike basic relays, the TCS monitors the entire loop including the trip coil, auxiliary switches, and the wiring between them.
• Universal Supply: Works seamlessly on both AC and DC auxiliary systems within the 110–125V range.
• Visual Diagnostics: Features a clear mechanical or LED indicator to provide immediate “Healthy” or “Fault” status to substation operators.
• Delayed Response: Built-in time delay prevents false alarms during transient voltage dips or the actual operation of the circuit breaker.
• High Galvanic Isolation: Provides a high level of electrical separation between the monitored circuit and the alarm signaling contacts.

Important Considerations & Precautions

• Bypass Currents: The relay injects a very small sensing current into the trip circuit. Ensure that this current is significantly lower than the minimum pick-up current of the trip coil to prevent accidental tripping.
• Auxiliary Supply: The relay requires a stable auxiliary supply. If the auxiliary power fails, the relay will signal a fault even if the trip circuit itself is physically intact.
• Wiring Polarity: When used in DC systems, ensure correct polarity as specified in the ABB wiring diagram to ensure the internal sensing circuit functions correctly.
• Maintenance: Periodic testing of the alarm contact output is recommended during scheduled substation maintenance to ensure the relay hasn’t “stuck” in the healthy state.

Product Applications

The 1MYN569697-E is a staple in medium-to-high voltage electrical infrastructure:

• Substation Protection: Monitoring the trip circuits of vacuum circuit breakers (VCB) or SF6 gas circuit breakers.
• Power Plants: Ensuring the reliability of generator protection circuits and large motor feeders.
• Industrial Facilities: Protecting critical production assets where a failed trip operation could lead to catastrophic equipment damage.
• Renewable Energy: Used in the control panels of wind turbine transformers and solar farm substations.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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