Parameterization
SRW 01 | 5-43
5
5.7.9.4 Verification of the Earth Leakage Current Measuring
It is recommended to check the correct operation of the system periodically by applying a known earth leakage
current on the level defined on P632 through an earth leakage sensor and comparing it with that informed on
P037.
shows a connection scheme for the test.
Resistor calculation "R":
R =
V
I
Resistor power calculation "R":
P = R . I
2
Calculation of error percentage between the circuit
current ( I ) and the current informed on parameter
P037:
error
(%)
=
I - I
P037
I
x 100
Current I must satisfy the following condition:
0.3 ≤ I ≤ 5 A
V = Alternate supply source.
SRW01-UC
E1 E2
M
3 ~
R
S
A
V
~
I
Figure 5.21:
Connection scheme for circuit test of earth leakage current measuring
5.7.10 PTC Thermal Protection
The PTC thermal protection uses PTC sensors installed inside the motor for its protection.
Actuation range:
Actuation: value higher than 3.4 kΩ.
Reset: value lower than 1.6 kΩ.
The PTC protection presents the following alarms:
Shorted PTC sensor: The SRW 01 switches off the motor and signalizes error on the status led and the message
“E0034” on the HMI.
Open PTC sensor: The SRW 01 switches off the motor and signalizes error on the status led and the message
“E0035” on the HMI.
P644 – PTC Protection
Adjustable
Range:
0 = Disabled
1 = Enabled
Factory
Setting:
0
Proprieties:
Sys, rw
Description:
It enables or disables the PTC protection.
Содержание SRW 01
Страница 1: ...User s Manual Smart Relay SRW 01 Ethernet Motors Automation Energy Transmission Distribution Coatings...
Страница 2: ......
Страница 8: ...Contents...
Страница 108: ...Parameterization 5 62 SRW 01 5...
Страница 128: ...Monitoring 6 20 SRW 01 6...
Страница 148: ...Technical Characteristics 8 12 SRW 01 8...