Current Relay Kiepe STV

Function of the current relay is to break the control voltage to the electromagnetic coil of a contactor, via an auxiliary switch when the current exceeds a predetermined set value.

Function

Function with Locking Device
When set trip value is exceeded, the hinged armature moves, operates the switching elements and is mechanically locked.
lf the actual current value drops below the set trip condition, the ?locked? switching element can be unlocked by briefly energizing the coil of the unlocking device.

Function without Locking Device
The hinged armature remains in the down position as long as the preset value is exceeded. lf the value drops, the armature moves back into the starting position. The set value has to be indicated when ordering.

Construction

The current relay consists of 6 sub assemblies. These are:

Constructional Unit
Constructional Unit consists of base plate of insulating material, magnet yoke with supporting plate for switching elements, interlock with interlocking coil and stop for stroke limitation of hinged armature.

Hinged Armature
Hinged armature consists of armature screwed to an insulatingbase plate and a set screw for switching element and set screw for stroke limitation.

Trip Coil
The current coil operating the magnet system consists of a core with copper-wire-windings. Current coil from type No. 36 on has rectangular copper-wire windings.

Interlocking withTrip Coil
Interlock/release consists of operating coil and magnet system whose flexible armature interlock the hinged armature.

Switching Elements
Switching elements consist of auxiliary switches and their supports.

Setting of Switching Points
Setting of release values is possible by means of pressure spring, guide bar, indication plate and self-locking setting nut. The position and value is calibrated by Kiepe at the factory and is sealed with red lacquer.

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