11-4 Testing and Troubleshooting Date Code 20010731
SEL-352-1, -2 Instruction Manual
Note: In this manual, commands to type appear in bold/upper case: SET. Terminal keys or
relay front-panel buttons to press appear in bold/upper case/brackets: <ENTER>,
<TARGET RESET>
The following format represents relay output on your terminal screen.
Example 500 kV Line Date: 6/1/96 Time: 01:01:01
Step 1.
Purpose: Be sure you received the relay in satisfactory condition.
Method: Inspect the instrument for physical damage such as dents or rattles.
Step 2.
Purpose: Verify requirements for relay logic inputs, control power voltage level,
and voltage and current inputs.
Method: Refer to the information sticker on the rear panel of the relay. Figure 11.2
provides an example. Check the information on this sticker before
applying power to the relay or starting tests. Be sure your dc supply is
correctly adjusted for the control and logic input requirements.
PART NUMBER:
0352XXXXXXXXXXX
S/N:
LOGIC INPUT:
POWER SUPPLY:
AMPS:
99334035
85–264Vac 50/60 Hz
85–350Vdc 15W Max
125Vdc
5
DWG: M352028
V/f:
67
Figure 11.2: Relay Part Number and Hardware Identification Sticker
Step 3.
Purpose: Verify the communications interface setup.
Method: Connect a computer terminal to Port 2, 3, or 4 of the relay.
Communication Parameters: 2400 Baud, 8 Data Bits, 1 Stop Bit, N Parity
Cables: SEL-C234A for 9-pin male computer connections
SEL-C227A for 25-pin male computer connections
Step 4.
Purpose: Establish control power connections.
Method: Connect a frame ground to terminal marked GND on the rear panel and
connect rated control power to terminals marked + and –. Relays supplied
with 125 or 250 V power supplies may be powered from a 115 Vac wall
receptacle for testing.
Step 5.
Purpose: Apply control voltage to the relay, and start Access Level 0
communications.
Method: Turn on the relay power. The enable target (EN) LED should illuminate.
If not, be sure that power is present. Type <ENTER> from your terminal
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