Delta DPM-C520, Operation Manual

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C h a p t e r 4 O p e r a t i o n
4 - 5
4_
4.2.5 System Setup (SYS)
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Wiring methods (WR): options are one-phase two-wire (1PH2W), one-phase three-wire (1PH3W),
three-phase three-wire (3PH3W), and three-phase four-wire (3PH4W); default: three-phase four-wire.

Number of current transformers (CT): options are 1, 2 and 3; default: 3.

Number of potential transformers (PT): options are 0, 2 and 3; default: 3.

Steps:
1. Press BACK key to enter the setting page.
2. Press UP and DOWN keys at the same time for 5 seconds to unlock the setting.
3. Press NEXT key to see the setting option COM & SYS.
4. Press DOWN key to enter the system (SYS) setting page.
5. Use UP and DOWN keys to select the wiring method.
6. Press NEXT key to confirm the setting and start to set the next setting, the number of current
transformers (CT).
7. When the option starts blinking, you can use UP and DOWN keys to select the number of current
transformers you need.
8. Press NEXT key to confirm the setting and start to set the next setting, the number of potential
transformers (PT).
9. When the option starts blinking, you can use UP and DOWN keys to select the number of potential
transformers you need.
10. Press NEXT key to confirm the setting.
Note: You can go back to the previous setting item by pressing BACK key anytime, whether you have
completed or canceled the setting.
4.2.6 Current Transformer Setup (CT)

Ampere for the primary-side current transformer: ranging from 1 to 9999 A; default: 5 A.

Ampere for the secondary-side current transformer: options are 1 and 5 A; default 5 A.

Steps:
1. Press BACK key to enter the setting page.
2. Press UP and DOWN keys at the same time for 5 seconds to unlock the setting.
3. Press NEXT key to see the setting option CT & PT.
4. Press UP key to enter the current transformer (CT) setting page.
5. Use UP and DOWN keys to select the number for the primary-side current transformer.
6. Press NEXT key to confirm the setting and start to set the next number for the primary-side current
transformer.
7. Repeat steps 5-6 till you complete the settings of the 4 digit number for the primary-side current
transformer. Press NEXT key to set up the secondary-side current transformer.
8. When the option starts blinking, you can use UP and DOWN keys to select the number of the