Residual Current Monitor RCM1000V

Residual Current Monitor for AC-currents in grounded power supply systems

Residual Current Monitor RCM1000V

Part number


Product description

 

RCM1000V RCM100V monitors residual currents in grounded power supply systems. Used as a current relay it monitors AC- or pulsing DCcurrents for exceeding upper or lower limits. Insulation faults can be caused by damages (mechanical, thermic or chemical) of insulations or also by humidity or pollution. At currents > app. 250 mA (at 230 V) at a location, the fault can lead to danger of fire.

Applied as current relays RCM1000V can among others monitor current in the neutral conductor. Nonlinear loads, e.g. switching power supplies in PC, printers or lights with EGC, cause harmonics in the neutral conductor: Even when the load is symmetric, the harmonics can lead to an overload in the neutral conductor. RCM1000V detect and report this overload.

Residual current monitors detect these faults in widely branched power supply systems and make a signal before additional damage develops. By displaying the residual current also stealthy changes can easily be detected and localized by switching on and off parts of the power supply system.

Particularly useful in monitoring in systems in which no fault current circuit breaker can or shall be used, because an immediate switching would have wideranging consequences, such as breakdown of computersystems or interruption of processes of sensitive goods. RCM1000V do NOT replace fault current circuit breakers for protection from electric shock but they can complement it by detection an fault in the insulation before the systems has to be shut off.

  • Monitoring of residual currents
  • 2 limits for alarm and trip
  • Monitoring of current, 2 x under- or overcurrent or windows
  • Measuring range 0,003 … 9,999 A
  • Setting range 0,010...9,999 A
  • Display can be scaled
  • Test-button and automatic test every 24 hours
  • Input for current transformer STWA3D with monitoring of transformer
  • Start-up delay to suppress alarms when switching on
  • 4 digits bright LED-display for measured values and programming
  • LEDs for alarms, state of relays and units
  • Limit, hysteresis, switching delay and switch off delay individually programmable
  • Function of relays (nc-, or no-mode) and interlocked switching or autoreset programmable
  • Universal supply voltage AC/DC 24-240 V
  • Housing for DIN-rail mount, 70 mm wide, mounting height 55 mm

Technical Data

Rated supply voltage Us

.......

AC/ DC 24V - 240V, < 1,5W, < 5 VA

 

Tolerance

.......

DC 20,4 - 297 V, AC 20-264 V 50 ...500 Hz

 

Relays K1, K2 (alarm 1, 2)

.......

2 x 1 co-contacts, type 2, see general technical informations

 

Monitoring of current (program 1 and 2)

External transformer

.......

Type STWA3D... (20, 35, 70, 125)

 

Cable for external transformer

.......

≤ 10 m, single wire, ≥ 0,75 mm2

 

Measuring range

.......

0,003 A ... 9,999 A

 

Hysteresis alarm 1/alarm 2

.......

10 % ... 25 %

 

Rated frequency range

.......

50 ...500 Hz

 

Startup delay power on

.......

adjustable 0 ... 10 s

 

Delay alarm on

.......

adjustable 0,03 ... 10,0 s (Prog. 2 = 0,03 ... 500,0 s)

 

Delay alarm off

.......

adjustable 0 ... 999 s

 

Residual current relay ( program 1 only EN 62020)

Rated residual operational current (Ion)

.......

Alarm 2 -> adjustable 0,010 A ... 9,999 A
Alarm 1 -> adjustable 50% ... 100% of alarm 2

 

Switching limits for alarm 1/alarm 2

.......

0 ... -20%

 

Function at loss of supply voltage Us

.......

depending of configuration of relays: 
closed current -> relays release = alarm
operating current -> relays remain released (= no
alarm)

 

Response characteristic

.......

Typ A

 

Current relay ( program 2 only)

Monitoring range alarm 1 / alarm 2

.......

0,010 A ... 9,999 A

 

Hysteresis alarm 1 / alarm 2

.......

10%...25%

 

Accuracy 50/60 Hz

.......

± 2%, ± 3 digit

 

Accuracy > 60 Hz

.......

± 10%, ± 3 digit

 

Insulation (EN 60664-1)

Rated impulse withstand voltage

.......

4000 V

 

Rated insulation voltage (Ui)

.......

AC 300 V

 

Overvoltage category

.......

III

 

Contamination level

.......

2

 

EMC tests (EN 62020)

Emitted interference

.......

EN 61000-6-3

 

Burst

.......

EN 61000-4-4 ± 4 kV pulse 5/50 ns, f = 5 kHz, t = 15 ms, T = 300 ms

 

Surge

.......

IEC 61000-4-5 ± 2 kV

 

Electrostatic discharge

.......

IEC 61000-4-2 ± 3,8 kV discharge contact,
± 6 kV discharge air

 

Rated ambient temperature range

.......

-20...+65 °C

 

Storage temperature

.......

-20...+70 °C

 

Housing

Design

.......

V4, 4 TE, mounting height 55 mm

 

Dimension (w x h x d)

.......

70 x 90 x 58 mm

 

Protection housing/terminals

.......

IP30/20

 

Installation

.......

Snap mount on standard rail 35 mm acc. to EN 60715 or screws M4

 

Weight

.......

app. 170 g