ABB CMS-700 User Manual

12
CMS-700 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)
—
Measurements and Events definition
—
Principle of measurement
The principle of measurement for AC of the CMS-700 control unit includes measurement on the
mains and branches. On the mains side, all values are measured directly. On the branches, current is
measured while voltage, power factor as well as active power and energy are calculated using
measured mains values.
For further information, please refer to the following table
Mains Branches/Sensors
Measurement of
I
MAINS
(Current) [A] I
TRMS
, I
AC
, I
DC
(Current TRMS, AC, DC) [A]
Measured mains values used for calculation
U
MAINS
(Voltage) [V] U
MAINS
(Voltage) [V]
PF (Power Factor) PF (Power Factor) (manual configuration is possible)
THD (Voltage, Current) (%)
Calculation of
Power:
– active [W]
– apparent [VA]
– reactive [var]
P
SENS
(Active power) [W]
P
SENS
= U
MAINS
· I
AC
· PF
Energy [kWh] Energy
SENS
[kWh]
Attention: Referring to the
diagram in the figure aside,
please note that N on the
supply has to be connected
in order to avoid damage
of the device. Twisting
the phase and neutral
can damage the device.
Voltage-Input
Supply & Measurement
SMS-Bus,
3 x32 Sensors
Branches
CMS-Bus
Flat Cable
Mains Branches
Sensors
CMS 700
CT-Input
Current Measurement
L1/Supply
L2
L3
N/Supply
I1
A
B
A
B
A
B
A
B
I2
I3
14/N

ABB CMS-700 Specifications

General

Brand	ABB
Model	CMS-700
Category	Control Unit
Language	English