Toshiba GRL150-100 Series Instruction Manual page 120

<CLPTST>
• Enter 0(=Off) or 1(=State0) or 2(=State3) to set forcibly the test condition of the Cold Load
Protection (CLPTST) and press the ENTER key.
<THMRST>
The switch [THMRST] is used to perform the thermal overload element test because the resetting
time is in the order of minutes. The thermal overload element is instantaneously reset when the
[THMRST] is ON.
• Enter 1(=On) to reset forcibly the thermal overload element for testing and press the ENTER
key.
<IECTST>
• Enter 1(=On) for IECTST to transmit 'test mode' to the control system by IEC60870-5-103
communication when testing the local relay, and press the ENTER key.
<L.TEST>
The switch [L. test] is used for local testing. When the switch [L. test] is set to "1" (= On), the
current data received from the remote terminal is set to zero. This switching is transmitted to the
remote terminal and the remote terminal sets the current data received from the switching terminal
to zero.
• Enter 1(=On) for local testing, and press the ENTER key.
<T.TEST>
The switch [T. test] is used for local testing of the current differential elements. When the [T. test]
is set to "1" (=On), the local current data is looped into the receiving circuit interrupting the current
data from the remote terminal as well as transmitted to the remote terminal.
Note: The switch [T. test] must be used only when all the terminals are out-of-service. If not, the local
test current may cause a disturbance at the in-service remote terminal because this switching is
not recognized at the remote terminal.
In case of electrical interface, the electrical cable must be removed to prevent signal interfering
between sending and the receiving data. The remote terminal will detect the communication
failure.
Caution
Do not test the loop back mode testing which the send data (TX) and the receive data (RX) is
connected together by optical cable, because the GRL150 is applied the half duplex
communication. Therefore, use the switch [T. test].
Do not use both [L.TEST] and [T.TEST] simultaneously. The [L.TEST] is for the test using
only the local terminal current, and the [T.TEST] for the test using the local current and the
local current looped back.
<COM∗>, <SCOM∗> and <S2COM∗>
These settings are used to forcibly send communication data [COM1] to [COM5], [SCOM1] to
[SCOM5] and [S2COM1] to [S2COM12] for testing. Enter 1(=On) for a desired communication
data and press the ENTER key.
• Press the END key to return to the "Test" screen.
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