Quoting and Ordering Information

To request a quotation or order GES type MSC capacitor assembly, use the tables below to construct a catalog number, which will describe your requirement.

Table 1. Select the code describing the system voltage from Table 1.

 

Table 2. Select the code describing the total three phase kvar rating from Table 2.

Table 2
Total Bank Kvar
Total 3-Phase Kvar Rating	Code		Total 3-Phase Kvar Rating	Code
300	30		3750	375
450	45		3900	390
600	60		4050	405
750	75		4200	420
900	90		4350	435
1050	105		4500	450
1200	120		4650	465
1350	135		4800	480
1500	150		4950	495
1650	165		5100	510
1800	180		5250	525
1950	195		5400	540
2100	210		5550	555
2250	225		5700	570
2400	240		5850	585
2550	255		6000	600
2700	270		6150	615
2850	285		6300	630
3000	300		6450	645
3150	315		6600	660
3300	330		6750	675
3450	345		6900	690
3600	360		7050	705
-	-		7200	720
Contact us for other kvar ratings.

 

Table 3. Select the number of switching steps desired.   

Table 3

Number of Steps

Specify a number from 2 through 12.

 

Table 4. Kvar increment per step.

Table 4

Kvar per Step

Specify the kvar increment per step.

Note: Add the appropriate step number and KVAR increments to the catalog number

 

Table 5. Select the code describing the required bank connection.

Table 5
Connection Code
Description	Code
Ungrounded Wye	U
(3-phase-3wire, or 3-phase, 4-wire systems)
Grounded Wye	G
(3-phase, 4-wire multi-grounded systems only)
Delta	D
(3-phase, 3-wire, or 3-phse, 4-wire systems)

 

 Table 6. Select the codes describing the incoming section from Table 6. 

Table 6
Incoming Section Arrangement (A)
Incoming Arrangement		Incoming Options		Incoming Entry
(Select One Code)		(Select One Code)		(Select One Code)
Description	Code	Description	Code	Description	Code
Bus Termination Only	0	None	0	Bottom Entry (Standard)	0
Main 3-Pole Disconnect Switch	1	Control Power Transformer (CPT)	1	Top Entry	1
Main Fuses	2	Distribution Surge Arrester	2	Top Entry via Roof Bushings	2
Main 3-Pole Disconnect Switch & Main Fuses	3	Control Power Transformer (CPT) and Distribution Surge Arresters	3	-

 

Table 7. Select the code describing the switching options.

Table 7
Switch Options
Description	Code
Switched with 3 single-phase 200 amp Oil Switches	S
Switched with 3 single-phase 200 amp Vacuum Switches	V
Switched with 1 three-phase Vacuum contactor	C
(For use on systems up to 5 kV only)

 

Table 8. Select the code describes the optional equipment available as standard.

Table 8
Optional Equipment
Description		Code
Key interlock scheme		K
Penta-head bolt doors		P
Unbalance detection:
	Unbalance scheme for each step: Placing a detection scheme on each individual step will trip the affected step only and allow the remaining steps to function without hindrance. The affected step will be locked out until maintenance is performed and the step is reset.	1
	A main unbalance detection scheme: This method monitors the main capacitor bus feeding all the steps. All steps will drop and lock out if any step has an unbalance. The relay will have to be set for the smallest capacitor in a step.	2
Ground Switch:
	Ground switch for each step: Placing a ground switch on each individual step will allow the affected step to be grounded, capacitors to discharge and be separated from the rest of the capacitor assembly. This will allow the remaining steps to function without hindrance.	3
	A main ground switch scheme: This method requires more circuitry and less ground switches. All steps will have the capacitor step switch opened. The main disconnect switch will have to be opened separating the bank from the incoming line. Then the capacitor switches will have to be reclosed to allow the all capacitors to discharge.	4
Controller (select one):
	Allen-Bradley PLC	A
	Voltage	E
	Current	C
	Power Factor	P
	Var	R
	Multifunctional	L
	Manual	M
	none (supplied by others)	N
Paint (select one):
	Guardian Green, Munsell  No. 7.0GY3.2/1.5 (standard)	5
	Gray ANSI 61	6
	Light Gray ANSI 70	7
Enclosure (select one):
	Standard 11 ga Steel	S
	Aluminum	U
	Stainless Steel	T

 

Constructing a Catalog Number

The chart below shows how to construct the catalog number for the series MSC metal-enclosed capacitor assembly with the following requirements:

• 7200/12470 volt 3150Kvar three–phase
• Three stages to develop seven steps of 450 KVAR increments (3150 KVAR total).
• Three phase, four wire system – Grounded-wye connected bank
• Switched with 200 amp vacuum switches
• Main disconnect switch
• Bottom entry
• Control Power Transformer (Connected phase to neutral)
• Lightning arrestors
• Key-interlock scheme
• Ground switch for each step
• Allen Bradley Controller
• ANSI 61 gray
• Standard enclosure

MSC - Basic letters for series MSC metal enclosed Multiple Step Capacitor assembly

  G - Total installed three-phase Kvar from Table 1

    315 - Voltage rating code Table 2

      7 - Number of steps from Table 3.

        450 - Kvar increment from Table 4.

          G – Bank connection code; select from Table 5

            130 - Incoming section option code; select from Table 6

              V - Switch code; select from Table 7

                KABGR - Optional equipment codes: select from Table 8

The complete catalog number would be: MSC-G-315-7-450-G-130-V-KABGR

 

 

 

 

Example: If 3150 kvar is required that is switched in seven steps, one 450 kvar stage and three 900 kvar stage will be provided with a binary switching logic controller that is interfaced with the type of control strategy required (e.g., voltage, VAR, power factor, etc.). Sequence switching will be provided, in this example, as follows:

 

Step #	Stage 1 = 450 kvar	Stage 2 = 900 kvar	Stage 3 = 1800 kvar	Total Kvar
1	on	-	-	450
2	-	on	-	900
3	on	on	-	1350
4	-	-	on	1800
5	on	-	on	2250
6	-	on	on	2700
7	on	on	on	3150

 

This type of scheme reduces the number of required capacitors, capacitor fuses, switches, and current limiting reactors that in turn reduces the amount of enclosure (space) required for installation.