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04.03.20 en / 201A

The Measuring circuit includes an external residual current transformer. 
All conductors of a voltage system are fed through the transformer except 
the ground wire. In a healthy system the sum of all flowing currents is zero, 
so that no voltage is induced in the CT. If an earth fault occurs, sourcing a 
current flowing to ground, the current difference induces a current in the 
CT that is detected by the RN 5883.

If an earth fault occurs, sourcing a current flowing to ground, the current 
difference induces a current in the CT that is detected by the RP 5883.

On broken sensor wires and broken CT coils the unit goes into alarm state 
and the LEDs for pre-alarm (yellow) and alarm (red) flashes.

The unit has 2 changeover output contacts. One for alarm 11, 12, 14 and 
21, 22, 24 and one for pre-alarm. 

4 Setting Ranges can be slected from 10 mA to 3 A. The fine adjustment 
is made via potentiometer „Factor“ 
Measuring range = Range x Factor.
The alarm relay switches at 100 % of the adjusted response value.

The pre-alarm can be set in 10% steps between 10 and 100% of the 
alarm value.

Potentiometer t

v

 sets the switching delay between 0 and 10 seconds. The 

delay reacts on pre-alarm and alarm.

The different CT sizes require a correct adaption of the residual current 
monitor. 3 models are available:

Type

Suitable
residual current 
transformer

Frequeny range

RN 5883.12/61

ND 5015/024
ND 5015/035

DC + AC up to 250 Hz

RN 5883.12/010/61

ND 5015/070

DC + AC up to 180 Hz

RN 5883.12/020

ND 5018/105
ND 5018/140
ND 5018/210

DC + AC up to   60 Hz

Table 1

An external link on X1-X2 allows the change between energized and de-
energized on trip. A change of the function will only be valid after interrup-
tion of the supply voltage.
Terminal X1 / X2:   external link =  

De-energized on trip,

 

 

open =   

Energized on trip

De-energized on trip: In the case of groundfault or missing auxiliary supply   
 

 

the relays are de-energized,

 

 

the NC contacts 11/12; 21/22 are closed

 

 

In fault free state the relays are energized,

 

 

the NO contacts 11/14; 21/24 are closed

Energized on trip: 

In the case of groundfault the relays are energized,

 

 

the NO contacts 11/14; 21/24 are closed

 

 

in fault free state  the relays are de-energized,

 

 

the NC contacts 11/12; 21/22 are closed

If an adjusted value is reached on the measuring input (alarm or pre-
warning)at the standard type RN 5883 the signal is stored. Reset is made 
by pressing the button „Test/Reset“ for < 3 s s or by disconnecting the 
auxiliary supply (approx. 30 s).

If the „Test/Reset“ button is pressed for > 3 s, a test of the unit is made. 
The time delays run, the pre-warning and alarm is activated.

An LED chain shows the fault current between 10 and 100 % of the adju-
sted alarm value.
An analogue output 0 ... 10 V indicates also the fault current. 10 V corre-
sponds to 100 % of the adjusted alarm value.

It is of advantage to keep the range small and the Factor high.
Example: Setting 300 mA:  Range 0,1 x Factor 3 = 300 mA

Set-up and Adjustment Facilities

Function

M11736

LED "ON"

U connected

H

LED „Pre-Alarm“

LED "Alarm"

LED chain

I

=

e.g.

pA

IA x setting in %

: I

= 60mA x 50% = 30mA

Pre-alarm relay trips at 30mA

LED chain shows at that moment 50%

pA

Pushbutton

<3s = reset fault memory

>3s = devise test

I : Pre-Alarm

pA

I : Alarm value = Range x Factor

A

e.g.: I = 0,01A x 6 = 60mA

A

I = Alarm relay trips at 60mA

LED chain shows at that

moment 100%

A

t : response delay reacts on Alarm

and Pre-Alarm

v

RN 5883.12/001

Summary of Contents for VARIMETER RCM

Page 1: ...c If an influence is detected also a rotation of the CT by 90 could positively reduce the influence The AC DC sensitive residual current monitor RN 5883 allows an early detection of insulation faults...

Page 2: ...nge between energized and de energized on trip A change of the function will only be valid after interrup tion of the supply voltage Terminal X1 X2 external link De energized on trip open Energized on...

Page 3: ...kV 2 EMC Surge voltages Class 3 5 kV 0 5 J DIN VDE 0435 303 Electrostatic discharge 8 kV air IEC EN 61000 4 2 HF irradiation 80 MHz 2 7 GHz 20 V m class 3 IEC EN 61000 4 3 HF wire guided 10 V class 3...

Page 4: ...larm Energized or de energized on trip Without analogue output Auxiliary voltage UH AC DC 80 230 V Width 52 5 mm ND 5015 035 61 Article number 0066841 Residual current transformer for RN 5883 Diameter...

Page 5: ...ting clips ET5018 art no 0058754 set with 2 pcs for DIN rail mounting or screw mounting ND 5015 070 D L H H1 B C F k E G Dimensions mm 70 111 110 115 32 37 55 4 2 50 74 Weight g approx 220 Drill toler...

Page 6: ...onitor ND 5018 105 for DIN rail mounting Disassembling Residual Current Monitor ND 5015 024 and 035 M11123 Disassembling Residual Current Monitor ND 5015 070 D B L H M9777_b G ND 5018 105 D L B H G Di...

Page 7: ...PE PE PE N N L1 L L1 L1 L2 L L2 L2 L3 L3 L3 M8362_a PE L1 L2 L3 N i1 i2 k1 k2 X1 X2 11 12 14 21 22 24 A1 A2 RN5883 i1 i2 k1 k2 X1 X2 open operating current X1 X2 bridged de energized alarm indicator...

Page 8: ...8 04 03 20 en 201A E DOLD S HNE KG D 78114 Furtwangen e mail dold relays dold com internet http www dold com POBox1251 Telephone 49 7723 654 0 Telefax 49 77 23 654 356...

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