LOT 201.34 Non-Class 1E Vital 120 VAC

Question 1

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

Where is the 45 kVA 120V UPS Panels (DP003/DP004) located?

Answer 1

EAB 60’ next to RDMGs

Question 2

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

What indications are available in the MCR for the Non-Class 1E Vital 120 VAC System?

Answer 2

CP003

• *DP048A Trouble (20 kVA)**
• *DP005 Trouble (25 kVA)**
• *DP006 Trouble (25 kVA)**

No direct Control Room or ICS computer points for the 45 kVA system (DP003 and DP004). However, if DRPI (DP003) is lost we are susceptible to entering Tech Spec 3.0.3 condition.

Question 3

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

How long will it take for load to shift back to the inverter once power returns?

Answer 3

• 20 kVA (DP048A):*
• *30 sec**
• 25 kVA (DP005/DP006):*
• *5 minutes**
• 45 kVA (DP003/DP004):*
• *30 sec**

Can block if transfer to load pushbutton is pressed. ***

• Note:*
• Name of button changes slightly for each type of UPS.*

Question 4

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

What powers the 45 kVA 120V UPS Panels (DP003/DP004)?

Answer 4

• Normal (VRT):*
• *MCC 1L1 (DP003)**
• *MCC 1L2 (DP004)**
• B/U (VRT)*
• *MCC 1G8**

• Note:*
• 45 kVA 120V UPS Panels do NOT have rectifiers, inverters, or batteries. It’s backup is the TSC DG.*

Question 5

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

What is the difference between a rectifier and an inverter?

Answer 5

• Rectifier:*
• *Turns AC into DC**
• Inverter:*
• *Turns DC into AC**

Question 6

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

What is the purpose of the Inverter Pre-Charge Pushbutton?

Answer 6

Places DC around inverter DC breaker prior to shutting breaker

Extends life of inverter capacitors.

Question 7

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

What powers the 25 kVA 120V UPS panels (DP005/DP006)?

Answer 7

• Normal (Inverter):*
• *125VDC Bus 1B**
• Alternate (VRT):*
• *MCC 1J1 (DP005)**
• *MCC 1J2 (DP006)**

Note:
Unlike 20 kVA 120V UPS panels, the 25 kVA 120V UPS panels do NOT contain a rectifier.

Question 8

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

Where are the 25 kVA 120V UPS panels (DP005/DP006) located?

Answer 8

EAB 10’ in hallway

Question 9

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

Where are the 20 KVA 120 V UPS panels (DP048A) located?

Answer 9

• Inverter / Rectifier / VRT:*
• *TB 31’ SE corner by BOP DG**
• DP048A:*
• *TB 55’ looking at it once you exit E stairwell**

Question 10

• LOT 201.34 Non-Class 1E Vital 120 VAC*
• • *

What powers the 20 kVA 120V UPS panels (DP048A)?

Answer 10

• Normal Power (Rectifier & Inverter):*
• *MCC 1F4**
• B/U DC (Inverter):*
• *125 VDC 1A**
• B/U AC (VRT):*
• *MCC 1G1**