SE Digest 178

QMB/QMJ Fusible Panelboards Switch Units

QMB/QMJ Fusible Panelboards Switch Units—600 Vac, 250 Vdc

www.se.com/us

Refer to Catalog 4620CT9601

Fusible—600 Vac, 250 Vdc Table 9.150: Available QMB Accessories 1 NO and 1NC Electrical Interlocks on Main Switches 2NO and 2NC Electrical Interlocks on Main Switchs

Electrical Interlocks

Equipment Ground Bars

Standard Ground Bar Copper Ground Bar Insulated/Isolated Ground Bar

Name Plates Copper Neutral

Copper Neutral 125-400A

600A 800A

Enclsoure Modifications

Hinged Trim Weatherproof - NEMA 3R

Lugs

Mechanical Lugs - Standard Copper Mechanical Lugs Copper Compression Lugs Aluminum Compression Lugs VCELLugs

9 PANELBOARDS

UL Listed Short Circuit Ratings for QMB Starters

Fusible switch-600V Max. (with Class R or J Fuses) RMS Sym. Amps

Thermal-Magnetic Bircuit Breaker 600V Max. Rms Sym. Amps

Starter Size

100,000 100,000 100,000 100,000

5,000 5,000 5,000 5,000

0 1 2 3

Common Features QMB Layout Information

To maximize the quantity of branch switches, use QMJ switches from page 9-64. Class J fuses are available in time delay construction suitable for motor and transformer loads. Table 9.151: I-Line ™ Panelboard Split Bus Bars Ampacity MLO Additional Mounting Height Required On Split Bus Section [8] SplitBus 225A 7.5 in. 400A 9 in. 600A 12 in. 800A 12 in. 1200A 18 in. NOTE: For applications with main circuit breaker panelboards, contact your local Schneider Electric representative or distributor.

Main Switch or Main Lugs

30/30 @ 240 or 600 V or 60/60 @ 240 V are 4.5" high

100 A twin QMB 6" H @ 240 Volt 60 A twin QMB 6" H @ 600 Volt 100 A twin QMB 7.5" H @ 600 Volt 100 A twin QMJ 6" H @ 600 Volt 200 A QMB 9" mounting height, 200 Amp twin QMJ 7.5" mounting height 400 A QMJ 9" H, 400 A Class T 9" H, 400, 600 or 800 A QMB all require 15" H

Wiring Gutter

Maximum Mounting Space for Branch Units

38"

[8] For I-Line panelboards, dimension includes height of “SL” sub-feed lug kit from Digest, plus 3 in. from available branch mounting space. © 2021 Schneider Electric All Rights Reserved 6/20/2021

9-65