Technical data

49
Protective Devices
Combined RCD/MCB Devices CKN4, 1+N-pole
• Combined RCD/MCB device
• Line voltage-independent tripping
• Compatible with standard busbar
• Twin-purpose terminal (lift/open-mouthed) above and below
• Busbar positioning optionally above or below
• Free terminal space despite installed busbar
• Contact position indicator red - green
• Comprehensive range of accessories suitable for subsequent installation
• Type -A: Protects against special forms of residual pulsating DC which
have have not been smoothed
Accessories:
Auxiliary switch for
subsequent installation Z-AHK 248433
Tripping signal switch for
subsequent installation Z-NHK 248434
Shunt trip release Z-ASA/.. 248286, 248287
Tripping module Z-KAM 248294
Terminal cover cap KLV-TC-2 276240
Additional terminal 35mm
2
Z-HA-EK/35 263960
Switching interlock IS/SPE-1TE 101911
Technical Data
Electrical
Design according to IEC/EN 61009
Current test marks as printed onto the device
Tripping
line voltage-independent instantaneous 250A (8/20µs)
surge current-proof
Rated voltage 230 V; 50 Hz
Operational voltage range 196-253 V
Rated tripping current 10, 30, 100, 300 mA
Rated non-tripping current I
Δno
0.5 I
Δn
Sensitivity AC and pulsating DC
Selectivity class 3
Rated breaking capacity 4.5 kA
Rated current 2 - 40 A
Rated peak withstand voltage U
imp
4 kV (1.2/50µs)
Characteristic B, C
Maximum back-up fuse (short circuit) 100 A gL (>4,5 kA)
Endurance electrical comp. ≥ 4,000 operating cycles
mechanical comp. ≥ 20,000 operating cycles
Mechanical
Frame size 45 mm
Device height 80 mm
Device width 35 mm (2MU)
Mounting quick fastening with
2 lock-in positions on
DIN rail IEC/EN 60715
Upper and lower terminals open mouthed/lift terminals
Terminal protection finger and hand touch safe,
BGV A3, ÖVE-EN 6
Terminal capacity 1 - 25 mm
2
Busbar thickness 0.8 - 2 mm
Degree of protection, built-in IP40
Tripping temperature -25°C to +40°C
Storage- and transport temperature -35°C to +60°C
Resistance to climatic conditions acc. to IEC/EN 61009
Dimensions (mm)
Connection diagram
1+N-pole
Tripping Characteristic CKN4-../1N/, Characteristics B and C
Valid for combined RCD/MCB devices 1+N-pole
Effect of ambient temperature (MCB component)
Load Capacity
Tripping characteristic according to EN 61009
Defined non-tripping current
Defined tripping current
Ambient temperature T [°C]
Load capacity K
T
[I/In]