The CMC 356 is the universal solution for testing all generations and types of protection relays.
Its powerful six current sources (three-phase mode: up to 64 A / 860 VA per channel) with a
great dynamic range, make the unit capable of testing even high-burden electromechanical
relays with very high power demands. Commissioning engineers will particularly appreciate
the possibility to perform wiring and plausibility checks of current transformers, by using
primary injection of high currents from the test set. The CMC 356 is the first choice for
applications requiring the highest versatility, amplitude and power. The CMC 356 can either
be operated by the Test Universe software running on a PC or by the front panel control device
CMControl.
Current generators
Setting range
6-phase AC (L-N) 6 x 0 ... 32 A
3-phase AC (L-N) 3 x 0 ... 64 A (Group A II B)
1-phase AC (LL-LN) 1 x 0 ... 128 A (Group A II B)
DC (LL-LN) 1 x 0 ... ±180 A (Group A II B)
Power
2
6-phase AC (L-N) 6 x 430 VA typ. at 25 A
6 x 250 W guar. at 20 A
3-phase AC (L-N) 3 x 860 VA typ. at 50 A
3 x 500 W guar. at 40 A
1-phase AC (LL-LN) 1 x 1000 VA typ. at 80 A
1 x 700 W guar. at 80 A
1-phase AC (L-L) 1 x 1740 VA typ. at 50 A
1 x 1100 W guar. at 40 A
1-phase AC (L-L-L-L) 1 x 1740 VA typ. at 25 A
1 x 1100 W guar. at 20 A
DC (LL-LN) 1 x 1400 W typ. at ±80 A
1 x 1000 W guar. at ±80 A
1000
800
600
400
200
0
0 10 20 30 40 50 60
Output current / A
3-phase AC (L-N)
6-phase AC (L-N)
Output power (typ.) / VA
1-phase AC (L-L-L-L)
1-phase AC (L-L)
1-phase AC (LL-LN)
0 100 120
2000
1600
1200
800
400
0
20 40 60 80
Output current / A
Output power (typ.) / VA
Accuracy
3
error < 0.05 % rd.
4
+ 0.02 % rg.
4
typ.
error < 0.15 % rd. + 0.05 % rg. guar.
Distortion (THD+N)
5
< 0.05 % typ., < 0.15 % guar.
Resolution 1 mA
Max. compliance voltage
(L-N)/(L-L)/(L-L-L-L)
35 Vpk / 70 Vpk / 140 Vpk
Connection banana sockets 4 mm (0.16 in) banana sockets
(32 A continuously)
Connection combination socket Group A only (25 A continuously max.)
Voltage generators
Setting range 4-phase AC (L-N) 4 x 0 ... 300 V (VL4(t) automatically
calculated: VL4 = (VL1+VL2+VL3)*c
or freely programmable)
3-phase AC (L-N) 3 x 0 ... 300 V
1-phase AC (L-L) 1 x 0 ... 600 V
DC (L-N) 4 x 0 ... ±300 V
Power 3-phase AC (L-N) 3 x 100 VA typ. at 100 ... 300 V
3 x 85 VA guar. at 85 ... 300 V
4-phase AC (L-N) 4 x 75 VA typ. at 100 ... 300 V
4 x 50 VA guar. at 85 ... 300 V
1-phase AC (L-N) 1 x 200 VA typ. at 100 ... 300 V
1 x 150 VA guar. at 75 ... 300 V
1-phase AC (L-L) 1 x 275 VA typ. at 200 ... 600 V
1 x 250 VA guar. at 200 ... 600 V
DC (L-N) 1 x 420 W typ. at ±300 V
1 x 360 W guar. at ±300 V
Output voltage / V
Output power (typ.) / VA
1-phase AC (L-L)
1-phase AC (L-N)
3-phase AC (L-N)
4-phase AC (L-N)
300
250
200
150
100
50
0
0 100 200 300 400 500 600
Accuracy error < 0.03 % rd.
4
+ 0.01 % rg.
4
typ.
at 0 ... 300 V
error < 0.08 % rd. + 0.02 % rg. guar.
at 0 ... 300 V
Distortion (THD+N)
5
0.015 % typ., < 0.05 % guar.
Ranges 150 V / 300 V
Resolution 5 mV / 10 mV in range 150 V / 300 V
Connection 4 mm (0.16 in) banana sockets /
combination socket (1,2,3,N)
Generators, general
Frequency
range sine signals
6
10 ... 1000 Hz
range harmonics /
interharmonics
voltage: 10 ... 3000 Hz
7
current: 10 ... 1000 Hz
range transient signals DC ... 3.1 kHz
7
accuracy / drift ±0.5 ppm / ±1 ppm
resolution < 5 µHz
Phase
angle range -360° ... +360°
resolution 0.001°
error at 50 / 60 Hz voltage: 0.02° typ., < 0.1° guar.
current: 0.05° typ., < 0.2° guar.
3
Bandwidth (-3 dB) 3.1 kHz
Technical Data
1
1
All data specified are guaranteed, except where indicated otherwise.
OMICRON guarantees the specified data for one year after factory calibration,
within 23 °C ±5 °C (73 °F ±10 °F) in the frequency range from 10 to 100 Hz and
after a warm-up phase > 25 minutes
2
Typical AC values valid for inductive loads (e.g. e/m relays)
3
Rload: 0 ... 0.5 W
4
rd. = reading, rg. = range
5
THD+N: Values at 50/60 Hz, > 1 A / 20 V with 20 kHz bandwidth
6
For current outputs amplitude derating at > 380 Hz
7
Amplitude derating at > 1000 Hz
CMC 356
CMC 356: 6 Phase Current + 4 Phase Voltage Test Set and Commissioning Tool
(12 pages)
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