Download fault-relay reo1 - Hansen Electric spol. s ro

FAULT-RELAY REO1
It is determined for protection of three-phase electric motors. It consists of the following individual parts:

Thermistor tripping relay KLH

Monitoring relay ZLS

Earth leakage relay UP6R

Overcurrent relay LH86 supplemented with current measurement
Thermistor tripping relay KLH provides protection for electric motors from excessive warming.
Temperature increase is registered by temperature-sensitive sensors -
thermistors with positive thermal
coefficient PTC.
Monitoring relay ZLS is determined for realization of time-delay in control circuits. The switching time delay
can be set up at 0,1 to 10s. Breaking occurs immediately after the supply has been switched off.
Earth leakage relay UP6R is used for supervision over the state of isolation of electric networks and
connected devices. After reduction of isolation resistance below the set-up value of the circuit, the relay signals
failure by means of its contacts.
The electronic overcurrent relay LH86 along with the corresponding converters of current/voltage is
determined for protection from thermal effects of overcurrents and for protection from effects of short-circuit
currents of three-phase electric motors. It is also equipped with optional guarding of phase fall-out. Using
switches and potentiometers we can select the nominal current of the electric motor in a wide range from 2.1A to
750A, the size of short-circuit current in range from 3 to 12xIn and also some of the three tripping
characteristics.
The whole unit is placed in a plastic box and it is mechanically fixed by means of a mounting screw. On the front
part there are control units, on the top there are three holes blinded with a bushing seal providing access to
the DIP switches. The cover is labelled to provide description of outlets connection, description of switches and
characteristics of overcurrent and short-circuit protection.
Relays of individual protections have switching contacts individually led out onto the connector where the
contacts remain closed until a failure occurs. The breaking contacts whose one pole is interconnected are not
closed until a failure occurs. Output circuits KLH and UP6R are classified as intrinsically safe (not flammable by
K56007-67_0391_A
spark) according to standpoint No.00/0047 SZ No.210 of Physical Technical Testing Institute in OstravaRadvanice.
Technical data
 Supply voltage
 Total consumption including ZLS
 Dimensions
 Permitted ambient temperature
 Outlet contacts
 Coverage range
Part KLH
 Measuring voltage
 Short-circuit current in measuring circuit
 Max. inductance of guarding loop
 Max. capacity of guarding loop
 Tripping value of resistance
 Value of transition into basic state
Part ZLS
 Supply voltage
 Input power
 Time
Part UP6R
 Measuring voltage
 Short-circuit current in measuring circuit
 Max. inductance of guarding loop
 Max. capacity of guarding loop
 Tripping resistance
Part LH86
 Range IN:
for sensor 3mV/A
for sensor 1mV/A
 Tripping characteristics
 Tripping at short-circuit
 Optional starting delay
K56007-67_0391_A
AC 42V, +15%, -20%, 40..60Hz
140mA; 5,9VA
144x40x120mm
from -10°C to 60°C
42V/5A
IP30
ca 2,3V
max. 23mA
1mH
500nF
13..14kOhm
6..7kOhm
AC 42V, +15%, -20%, 40..60Hz
1.2VA
from 0.1 to 10s
DC 20V
max. 5.5mA
1mH
500nF
when being produced, adjustable from 5 to 250kOhm
2.1 to 250A
6.3 to 750A
5s, 8s, 20s (time gives tripping at 6xIN)
3 to 12IN
10ms