Failure phenomenon

Failure Mode

Failure

Relay is not action

Coil-side no-voltage

Supply line circuit

Circuit wiring errors

Circuit wiring short-circuit

Foot welding leads to bad

Coil terminal voltage less than

Power Supply Voltage Low

Power cord is too long

Select size high-voltage relays

Coil unreasonable

Welding bad

Coil break

Relay does not release

Coil terminal voltage is too high residual

Coil-side there are other components of energy storage

Youlou coil current or bypass current

The remaining high-voltage semiconductor circuits

Relay instability

Power instability

Too Ripple Power Supply

Undervoltage

Relay parameter instability

Dropped or subjected to strong shocks

Winding inter-turn short circuit

Relay malfunction

Control program is incorrect

Excessive use of environmental vibration

Contact Adhesive

Overcurrent

The load is too large

Inrush current is too large

Contact abnormal jitter

External vibrations

Relay instability

Relay frequency is too high

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The ambient temperature is too high

Relay service life expires

Contact is not closed

Contact resistance is too large

Welding bad

Contacts between the foreign body

The use of a bad environment, contact oxidation or sulfide

No current contact terminal

Load circuit breaker

Circuit wiring fault or short-circuit

Welding bad foot print

Relay life

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