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Installation and Operating Manual

residual current circuit-breakers of series

DFS 4 B SK / F60 / V500 /

V500 F60 / S / S V500

Installation position

Any installation position may be used.

Intended use and mounting

By snapping onto top-hat rail and for installation in distribution boards with com-

pliant covers for preventing direct contact with hazardous live parts.

Electrical connection

Guide all active conductors and outer cables (L1, L2, L3 and the neutral conduc-

tor MP/N) through the switch. When doing so, pay attention to the energy flow

direction, i. e., the input terminals are 1, 3, 5, 7, the consumer system side is 2, 4,

6, 8. Scrape and grease aluminium conductors immediately before connection.

Function and area of application

The residual current circuit-breakers of the DFS 4 B SK model ranges are AC-

DC sensitive residual current circuit-breakers for detecting Type B residual cur-

rents. These devices are designed for use in single- and multi-phase mains

systems. They are not intended for use in DC networks. They consist of a mains

voltage-independent part for detecting sinusoidal AC and pulsating DC residual

currents with a rated frequency of 50 Hz (rated frequency of 60 Hz with se-

ries F60), as well as a mains voltage-dependent part for detecting residual cur-

rents within a frequency range of 0 Hz to 100 kHz.

In order to ensure protection in the event of indirect contact with a maximum

touch voltage of 50 V resp. 25 V across the entire covered frequency range, the

earth resistance must be < 167 Ohm resp. < 83 Ohm, when a residual current

circuit-breaker with a rated residual current < 300 mA is used. When using re-

sidual current circuit-breakers with a rated residual current of 500 mA, the earth

resistance must be < 100 Ohm resp. < 50 Ohm.

For frequencies > 1 kHz the tripping current for a DFS 4 B SK is below 2 A. This

means that highest possible system availability is ensured in this frequency

range, within which the usual switching frequencies of frequency converters

are located.

Testing and functional check

An insulation test of the user equipment is to be carried out in accordance with

DIN EN 61557-2. This may only be done when the device is switched off. Insula-

tion testing when the device is switched on or insulation testing on the input side

may lead to incorrect measured values. A functional inspection of the residual

current circuit-breaker itself is possible with connected mains voltage by press-

ing the test button T and, as in commercial use (BGV A3), should be carried

out at least every six months in the case of stationary systems and should be

repeated every working day in the case of non-stationary systems.

The green LED signals that the internal operating voltage is sufficient for AC-

DC sensitive residual current detection (residual currents of type AC, A and B).

If the LED does not illuminate, then only tripping via type AC and A residual

currents is still guaranteed. The internal supply of the DFS 4 B SK is carried out

via the terminals 1, 3, 5, 7. At least two arbitrary conductors must conduct AC

voltage of greater than 50 V in order to guarantee residual current detection that

is sensitive to all currents.

Important information on operation with electronic equipment (such as

frequency converters, inverters etc.)

1. Electronic equipment and its associated EMC protective provisions, such

as e. g. integrated or in series-connected EMC filters, as well as shielded

cables, can give rise to high capacitive leakage currents.

2. The maximum number of items of electronic equipment connected down-

stream of the DFS 4 B SK is based on the level of leakage currents that

occur. Excessive discharge currents may lead to undesired tripping in spite

of the special release frequency response. Relevant information concerning

the discharge currents that are produced can be requested from the manu-

facturers of the electronic equipment.

3. During operation with frequency converters long, shielded motor cables

may lead to high discharge currents in the event of the controller release

of the frequency converter, which lead to undesired tripping. If necessary,

a sinusoidal output filter should then be used directly behind the frequency

converter (before the shielded motor cable).

4. When switching on and off electrical systems with electronic equipment, it is

possible that very high surge leakage currents will be produced, which will

lead to tripping in the event of an appropriate duration. In order to keep the

processes for switching on and off as short as possible, the electrical system

should not be switched on with the DFS 4 B SK. Quick-switching, all-pole

contactors or switches with stored energy operating mechanisms are suit-

able (manual rotary switches should not be used).

3930212 | 05/2013

5. According to the instructions, a conventional 3-conductor EMC filter should

only be connected in series with the relevant electronic equipment. So

that the filter effect is not impaired, under no circumstances should further

single-phase consumers such as incandescent bulbs be connected on the

output side of the EMC filter.

6. As a rule, different clock frequencies (chopper) can be selected in the case

of electronic equipment. In an unfavourable case, the clock frequency may

lead to a tendency to oscillation in an upstream EMC filter and therefore

to greatly increased leakage currents, which then result in a tripping of the

DFS 4 B SK. In this case, the clock frequency must be changed.

7. Frequency converters with an integrated EMC filter often only allow a maxi-

mum length of the shielded motor cable of 5 to 10 m. Longer cable lengths

lead to greatly increased discharge currents and to the ineffectiveness of

the integrated EMC filter. The manufacturer's specifications must always be

observed for the frequency converter.

Application instructions and warnings

The following notes and warnings must be observed in order to ensure safe

operation:

1. Installation may only be carried out by an authorised specialist, who is famil-

iar with the relevant national installation regulations.

2. Without any additional protective housing, residual current circuit-breakers

should only be stored and operated in a dry, low-dust environment. An ag-

gressive atmosphere must also be avoided.

3. The user must be made aware of repeat testing using the test button T.

4. Using surge current strength residual current circuit-breakers cannot abso-

lutely guarantee to rule out trips due to leakage currents caused by surge

voltage. In cases where an interruption of the power supply may lead to

potential dangers for humans and animals or serious damage to property,

residual current protection should be implemented by means of increased

surge current strength, selective residual current circuit-breakers and up-

stream surge arresters. In specific cases, the switching status should be

monitored by means of an auxiliary contactor at the residual current circuit-

breaker and an appropriate signalling device.

5. The guarantee will be rendered null and void if the device is opened.

Wiring diagrams

1 3

2 4

V two-pole

(N)

1 3 5

(N)

(N) 2 4 6

(N)

V four-pole, neutral on left or right, depending on device version

Technical Data

DFS 4 B SK / F60 / V500 / V500 F60 / S / S V500

Rated current

Rated residual current I ∆N

Detection range of residual

current

Rated

voltage

U n

DFS 4 B

Rated

frequency

DFS 4 B

residual currents

min.

operating

voltage

residual currents

Internal consumption

SK, SK F60, SK S

Working

range of

test circuit

DFS 4 B

number of poles

Dissipation power P v (typ.)

Thermal back-up fuse

OCPD,

utilization category gG

Short-circuit back-up fuse

SCPD,

utilization category gG

Tripping times

Tripping times selective

Rated switching capacity I m

Rated short-circuit switch-

ing capacity I ∆m

Rated short-circuit current

I nc

Rated residual short-circuit

current I ∆c

Surge current strength

Shock resistance

Type of protection

Installation position

Supply side

Ambient temperature

Resistance to climatic

changes

round-wire, solid

Terminals

min. cross section

Tightening torque of

terminals

Endurance

Design requirements

Electromagnetic compat-

ibility

Weight

Dimensions

DIN VDE 0636, IEC 60269

16 A

25 A

40 A

63 A

80 A 100 A 125 A

0.03 A; 0.1 A; 0.3 A; 0.5 A

0 – 100 kHz

SK F60

230/400 V AC

SK V500 F60

290/500 V AC

50 Hz

SK F60

60 Hz

SK V500

50 Hz

SK V500 F60

60 Hz

for detection of

0 V (mains independent)

Type A/AC

for detection of

50 V AC

Type B

max. 3.5 W

185 V AC – 440 V AC

SK V500,

SK V500 F60,

185 V AC – 500 V AC

SK S V500

two-pole, four-pole

0.5 W 1.2 W 2.9 W 7.2 W 12 W 18 W 28 W

16 A

25 A

40 A

63 A

100 A

1 x I ∆n ≤ 300 ms; 5 x I ∆n ≤ 40 ms

1 x I�n > 130 ms ≤ 500 ms;

5 x I�n > 50 ms ≤ 150 ms

500 A

630 A 800 A 1000 A 1250 A

500 A

630 A 800 A 1000 A 1250 A

10 kA

Ring-wave 0.5 ms / 100 kHz:

200 A, impulse 8/20 µs: 3 kA

20 g / 20 ms duration

IP 40 (after installation in distribution board)

optional

terminals 1, 3, 5, 7

-25 °C to +40 °C

conforming to IEC 68-2-30: damp/heat, cyclic

(25 °C / 55 °C; 93 % / 97 % rel. hum., 28 cycles)

1 x 1.5 – 50 mm²

2 x 1.5 – 16 mm²

1 x 1.5 – 50 mm²

stranded

2 x 1.5 – 16 mm²

1 x 1.5 – 35 mm²

flexible

2 x 1.5 – 16 mm²

50 mm²

3 Nm

mechanical

> 5,000 cycles

electrical

> 2,000 cycles

DIN EN 61008-1, DIN EN 62423

IEC 61 453 (interference resistance

– industrial environment)

approx. 500 g

W 72 mm (4 module width) × H 85 mm × D 75 mm

80 A

125 A