Thermal overload relay ISKRA BR63

for switches ISKRA KNL43-KNL75

Description

Special Features

3-pole overload relay
According to IEC/EN 60947-4-1
Protection for motors up to 47A rated current and 690V operating voltage
Electrically isolated auxiliary contacts (1 normally closed, 1 normally open)
Manual or automatic reset selectable
Phase failure sensitivity according to IEC/EN 60947-4-1
Temperature compensation
UL approval
Protection class IP20

Series Specifications

Designation

BR63

Rated operating voltage Ue

690 V

Impulse voltage load capacity Uimp

6 kV

Permissible operating temperature

-5°C ... +55°C

Installation position

Arbitrary

Mounting

Hooking onto the contactor, securing with screws in the main terminal blocks.

Connection terminals

Screw terminals

Connection cross-sections

2x 6.0 - 35 mm² (fine stranded with AEH)

Connection cross-sections auxiliary contacts

2x 0.75-2.5 mm² (fine-stranded with AEH)

Trigger class

switching frequency

Up to 15 cycles/h or 60 cycles/h with 40%.

Settings and notes - see also "More images".

Warning:

Insufficiently tightened clamping screws lead to unacceptable heating. The device may only be connected by qualified personnel. Do not touch live parts!

Commissioning Check:

Press the off button "O" to reset the relay. Pressing the slider "2" in the direction of the arrow will activate the device. The contact 95-96 opens, and the contact 97-98 closes. In the off state, the switching position indicator shows "1" in yellow.

Setting to Motor Rated Current:

The setting to motor rated current is done by turning the adjustment knob (3) until the point of the knob is at the desired rated current value.

Switching Between Manual - Automatic Reset:

Manual Reset:

With the button "R" (4), the triggered overload protection is reset. Please observe sufficient cooling time.

Automatic Reset:

Press and hold the button "R" (4) while moving the slider (5) in the direction of the arrow until it clicks into place. After releasing the slider, the button "R" (4) must remain pressed.

Auxiliary Switch:

Normally open contact 95-96, normally closed contact 97-98 galvanically isolated. Short circuit protection for the auxiliary switch 6A AC. The normally closed auxiliary contact 97-98 can be used to operate a signaling circuit. A single-pole changeover contact can be achieved by inserting a bridge between terminals 95 and 97.

Additional Views and Drawings