DOLD RL 5898 Traduction des instructions originales - Page 3

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Function

Behaviour with internal device faults

If internal device faults were detected during the test function, the status LED

flashes permanently red. The indicator relay K2 switch to the alarm state.

Behavior on faulty connection

When detecting broken wire on terminals L(+)/L(-), the measurement is

disabled. The reaction time could be up to 2 min. The monitoring relay K2

goes in alarm state, the status LED shows flash code 1 in red colour. After

removing the interruption the fault is automatically reset (max. reaction time

up to 2 min) and the measurement of the insulation resistance is continued.

Stored alarm values remain stored. An interruption of the protective earth

connections PE1/PE2 causes the same reaction as interrupting the

measuring circuit, only the status LED shows flash code 2 in red colour.

Behaviour at parameter failures

With wrong settings on the rotary switches the device goes to failure mode.

The indicator relay K2 changes to alarm state and the status LED shows

the red flash code 3.

External control input

To terminals X1/X2 an external combined Test-/Reset button can be

connected. If the terminals X1/X2 are bridged for approx. > 1.5 s and

< 10 s the test mode is started. This has the same function as pressing the

internal test button. When bridging X1/X2 for < 1.5 s, a stored alarm will

be reset. This has the same function as pressing the internal reset button.

If X1/X2 is activated for > 10 s, the measuring function is stopped.

The measuring function remains suspended for the duration of the control

of X1/X2.

Connection of an external coupling device

An external coupling device RP 5898/240 can be connected to extend the

input voltage range of the monitored voltage system on RN 5897/240. The

terminals with the same legend of the insulation monitor and the coupling

device RL 5898 or RP 5898 (VSG1, VSG2, L(+), L(-)) are connected together.

The network to be monitored is connected to terminals L1(+) und L2(-) on

the coupling device. Using the rotary switch "Rel./VSG" the connection

of the coupling device has to be selected and activated. The broken wire

detection is active on the terminals L1(+)/L2(-) on the coupling device.

A broken wire between coupling device and insulation monitor cannot be

detected immediately but the measured values on interruption of 1 or 2

wires between coupling device and insulation monitor are much lower as

the real values, which will cause an early response of the device.

Programming/setting of parameters/set-up of the insulation monitor

All settings are made via 3 rotational switches on the front of the device.

To avoid unauthorised manipulation of the settings, the unit has a sealable

transparent cover on the front.

The response value for Alarm is adjusted by the first rotary switch "R

The second rotary switch "Rel./VSG" is used to alter the relay function as

well as for activation/deactivation of the VSG. If set to "n.c." the output is

de-energized on trip, If set to "n.o." the output is energized on trip. The

VSG is activated in the "on" position and deactivated accordingly in the

"off" position. In addition this rotary switch has 2 sections. If the setting is in

the section, the broken wire detection in the measuring circuit is activated,

if the setting is on the second section, the broken wire detection in the

measuring circuit is de-activated.

The third rotational switch selects "UN" selects the voltage system connection

and manual or auto reset it has also 2 sections. In section one the unit is

on auto reset, in section 2 it is on manual reset. Changes of the setting the

unit accepts immediately without restart.

If the second or third rotary switch is in an undefined position, the unit

changes to "parameter failure" (see description under "behaviour at

parameter failures").

Function Diagram

U H

Earth fault

Hysteresis function

11-14

Open circuit operation

11-12

11-14

De-energized on trip

11-12

Manual reset

Reset

11-14

Open circuit operation

11-12

11-14

De-energized on trip

11-12

Semiconductor Output (PWM output)

5ms

Minimum pulse length 5ms (corresponds to 5k )

1000ms

Pulse length 1000ms (

corresponds to

2000ms

Maximum pulse legth 2000ms (

Broken wire detection:

Short circuit detection:

Flashing Codes Status LED

Measuring function

disabled

Self test

Extended

test

Internal

system error

Connection failure

measuring ciruit L(+)/L(-)

Connection failure

protective conductor PE1/PE2

Parameterization

error

3000ms

1M )

Pulse break

min. 1s

3000ms

corresponds to

2M )

M12318

If the PWM-signal is continuously high,

a broken wire is detected.

If the PWM-signal is continuously low, the

semiconductor may have a short circuit.

M12292

M12295

07.07.23 en / 755A