DEMA CPM 311, User Manual

Page: 199 / 213

- 199 -
Technical Specification Tables
Technical Characteristics
Nominal Current (I
n
)
1 A / 5 A (via dip-switch settings).
Nominal Frequency (f
n
)
50 Hz / 60 Hz (via menu settings).
Secondary Circuit Loads
Phase Current Inputs
for 1 A : 0.01 V∙A
for 5 A : 0.2 V∙A
Earth Current Inputs for 1 A : 0.01 V∙A
for 5 A : 0.2 V∙A
Current Circuit Thermal Withstand
100 I
n
/ 1 s
4 I
n
(20 A) / continuous
Current Circuit Dynamic Withstand
250 I
n
/10 ms
Current Transformer Recommendation In = 1 A : 1 V∙A, 5P10 or 5P20 (Additional secondary loads should be taken into
consideration.)
In = 5 A : 1 V∙A, 5P10 or 5P20 (Additional secondary loads should be taken into
consideration.)
Supply Voltage Range (Nominal)
(24-250) V
DC
, (100-250) V
A C
Supply Voltage Range (Limits)
(21-275) V
DC
, (80-275) V
A C
DC Consumption P
aux min
: 6 W
P
aux max
: 10 W
AC Consumption S
aux min
: 7.5 V∙A
S
aux max
: 10 V∙A
Trip Relay SPDT (N/C + N/O), 1 relay.
Internal Fault & Auxiliary Failure Relay SPDT (N/C + N/O), 1 relay.
Programmable Relays SPST (N/O), 2 relays.
Relay Contact Characteristics
Rated Values
8 A / 250 V
A C
ohmic, 8 A / 24 V
DC
ohmic.
Short Time Withstand Current 16 A / 3 s, 30 A / 0.5 s
Max. Switching Voltage
440 V
A C
Max. Switching Current 16 A
Max. Switching Power On making: 2.2 kW / 2.2 kV∙A
On breaking: 50 W / 2.2 kV∙A
Programmable Input Quantity 5 inputs with optic-coupling.
Rated Excitation Voltage
(24-250) V
DC
, (110-250) V
A C
Extended Excitation Voltage Interval
(21-275) V
DC
, (80-275) V
A C
Input Activation Delay
≤
15 ms
Max. current per input 3 mA
Passive Input is passive.
Unlatch Latched relays are reset and released.
52a Watches the normally open auxiliary contact of circuit breaker.
52b Watches the normally closed auxiliary contact of circuit breaker.
CB Position Used for displaying the circuit breaker position on the relevant menu.
Start tAux1 Triggers the first auxiliary timer.
Start tAux2 Triggers the second auxiliary timer.
Blocking Sel.1 Used for blocking selected protection functions while the protection group is set to
"1".
1 - Input and Output Characteristics
1.1 - Measuring Units
1.3 Output Relays and Relay Contact Characteristics
1.4 Programmable Inputs
Programmable Input Setting Options
1.2 Auxiliary Supply Voltage (Uaux)