Square D > On-line Catalog > Products > Switchboards and Switchgear > Unit Substations: Power-Zone Model III	Search

Digest 174 Quick Page Locator Enter a page number from our paper catalog to go directly to that page in our online catalog. Example: 5 - 3

Section - Page -

Unit Substations

Power-Zone® Model III

Classes 6010, 6020 / Refer to Handout 6010HO0101 or Brochure 6020BR9401

Unit Substations

 

Complete Close Coupled Unit Substations Available

Product Type	Class Nos.	Product Section No.
Primary Section
Medium voltage load interrupter switchgear	6040, 6045	11-1
Metalclad switchgear	6055
Low voltage Power-Style® QED switchboard	2741-2744
Air terminal chamber	7421-23, 7310, 7240, 7320
Transformer Section
Open, ventilated dry—Power-Dry™	7421-23	14-1
Open, ventilated dry/cast resin combination—Uni-Cast®	7320
Open, ventilated cast resin—Power-Cast®	7310
Mineral oil or high fire point fluid—liquid	7240
Secondary Section
Medium voltage load interrupter switchgear	6040	11-1
Metalclad switchgear	6055
Medium voltage motor control center	8198
Low voltage Power-Style QED switchboard	2741-2744
Air terminal chamber	7421,23, 7310, 7240, 7320
Low voltage drawout switchgear	6037
Low voltage Model 6 motor control centers	8998	17-1

Power-Zone® Model III Package Unit Substations

General

Model III Power-Zone package unit substations combine a primary switch, dry-type transformer and I-Line® distribution section into a single compact unit. All components are engineered, manufactured and tested by Schneider Electric. The substation is available with UL listing.

The Model III is only 37.25-inches deep and 90-inches high, which allows passing the entire substation through standard size doorways and narrow hallways.

Ventilation is toward the front, at the top of the transformer section, so the unit can be installed against a wall or in a corner without altering or derating.

Model IIIs are ideal for renovations and high rise applications requiring increased customer electrical demand as well as new construction requiring multiple zones and a small footprint.

75–1000 kVA at 480 Volts; 75–500 kVA at 240 Volts

Available with primary voltages of 2400–13800 volts. Forced air cooling (AA/FA) provides an additional 33%. Features 220°C insulation and 150°, 115° or 80°C temperature rise. Largest 80° or 115°C rise unit available is 750 kVA.

The secondary circuit breaker distribution section may be equipped with an individually mounted secondary main breaker or an I-Line® distribution panelboard. Branch circuit breakers from 15 amperes FY to PowerPact RLC 1200 ampere may be installed. PowerPact ® molded case circuit breakers M, P, and R frame are available with electronic trip units.

Additional options include CM 3000 and CM 4000 series circuit monitors, PM-800 series power meters, surge arresters, and I-Line plug-on unit with Surgelogic® Transient Voltage Surge Suppression (TVSS).

Incoming Line Section

Most Model IIIs are supplied with a Square D® fused HVL/cc 600 ampere load interrupter switch. The HVL/cc offers the smallest footprint in the industry and is an exclusive sealed interruption type compartmentalized switch. Where switching and overcurrent protection are provided elsewhere, a full-height air-filled terminal chamber can be provided in place of the switch.

 

Primary Switch Ratings, Type HVL/cc

Nominal Voltage	4.16	13.8
BIL	60	95
Continuous amperes	600	600
Interrupting amperes	600	600
Fault close (kA asymmetrical)	40	40
Momentary current (kA asymmetrical 10 cycles)	40	40
Duty-cycle-fault-close (number of operations)	4	4
Grounding switch fault close (kA asymmetrical)	40	40
Short-time rating (kA asymmetrical 2 seconds)	25	25
Dielectric withstand (kV 1 minute)	19	36
Electrical endurance (close-open)	100	100
Mechanical endurance (close-open)	1000	1000