Allen Bradley 1494V series variable depth flange mounted isolation switch

Allen Bradley 1494V series variable depth flange mounted isolation switch

Core framework and scope of application

The document categorizes six types of isolation switch kits, namely 30A, 60A, 100A, 200A, 400A, and 600A, based on current levels as the core dimension. Each type is classified according to the production year/series (such as Series A, Series B, Series D, etc.), clarifying the core components, fuse clip adaptation specifications, and accessory compatibility of the kits for each period. Applicable scenarios cover circuit isolation requirements in industrial power distribution systems that require flange installation and variable depth layout. It complies with UL, CSA, NEMA, ANSI and other standards, and is compatible with NEMA 1, 3R, 4, 4X, 12 and other protection level enclosures.

Core parameters of isolation switch kits for each current level

（1） Common Basic Information

Structural design: Both are 3-pole, 600V AC specifications, divided into right-hand type (model including "DS") and left-hand type (model including "DSX"). The left-hand type requires an additional adapter kit (such as 1495-N24, 1495-N25); Some series need to be used in conjunction with Trailer Fuse Blocks, and both must have the same series letters (such as Series A switches with Series A fuse blocks).

Fuse adaptation: Supports multiple types of fuses such as Class H, J, R, etc., and distinguishes fuse clip models based on voltage (250V AC/600V AC) (such as 1401-N series). Different current levels correspond to different fuse clip specifications to ensure matching overcurrent protection.

Accessory compatibility: The handle and connecting rod are only compatible within the same kit and cannot be interchanged across kits; Accessories such as auxiliary contacts and fuse covers should be selected according to their series to ensure proper functionality.

（2） Detailed specifications by current level

1. 30A isolation switch kit (1494V-DS30/DSX30 series)

Production Stage and Components

1975-2004 (Series A): Includes 1494V-DS30 Series A switch (left and right hands), fuse clip compatible with 1401- N41（250V Class H）、1401-N42（600V Class H&J）。

2004-2005 (Series 1): The switch remains unchanged, with the addition of 250V Class R (1401-N50) and 600V Class R (1401-N51) fuse clip adapters.

2005 (Series 2): The right-hand type is 1494V-DS30 Series B, the left-hand type is 1494V-DSX30 Series B, and the fuse clip specifications are the same as Series 1.

Since 2006 (Series 3): The switch has been upgraded to 1494V-DS30 Series D (right-hand) and 1494V-DSX30 Series D (left-hand), with accompanying trailer type fuse blocks (1494V-FS30 Series D, etc.).

Core accessories: The handle can be selected from 1494V-H1 (painted), 1494V-W1 (stainless steel), or 1494F series (plastic/painted/stainless steel); The connecting rod is divided into short styles (1494V-RA1/RA3) and long styles (1494V-RA2/RA4); The fuse cover is 1495-N56/N59/N64, etc., and the auxiliary contacts can be selected from 595-A (normally open), 595-B (normally closed), or 1495-N8/N9.

2. 60A Isolation Switch Kit (1494V-DS60/DSX60 Series)

Core difference: Upgraded fuse clip specifications, 250V Class H is 1401-N42600V Class H&J is 1401-N43250V Class R is 1401-N51600V Class R is 1401-N52; The trailer type fuse block model is the 1494V-FS60 series, and the accessory type is similar to the 30A kit, but the fuse cover has added the 1495-N66 model.

Adaptation scenario: It can carry higher current than the 30A kit and is suitable for power isolation of medium power industrial equipment such as medium-sized motors and frequency converters.

3. 100A Isolation Switch Kit (1494V-DS100/DSX100 Series)

Series Evolution: Series A from 1975-1993, Series B from 1993-2004, Series C from 2005, and Series D from 2006 to present; The fuse clips are unified as 1401-N44 (250V/600V Class H&J) and 1401-N53 (250V/600V Class R), and the matching trailer type fuse block is the 1494V-FS100 series.

Accessory features: In addition to conventional models, the auxiliary contacts require an adapter 1495-N24 for the left-hand type and 1495-N64/N65/N66 for the fuse cover, meeting the safety protection requirements in high current scenarios.

4. 200A-600A high current isolation switch kit

200A (1494V-DS200/DSX200 series): The fuse clip is 1401-N45 (Class H), 1401-N54 (Class R), and the trailer type fuse block is 1494V-FS200 series; The fuse cover is designed for both left and right hands (1495-N62/67), and the left-hand type requires an adapter 1495-N25, suitable for high-power motors and large distribution cabinets.

400A (1494V-DS400/DSX400 series): The handle has been upgraded to 1494V-H2 (painted) and 1494V-W2 (stainless steel), and two connecting rods are required in a set (1494V-RB1/RB3 short version, RB2/RB4 long version); The fuse cover is 1495-N61/63/68, and the auxiliary contacts need to be matched with adapter 595-N1 to adapt to high-power industrial systems (such as factory power distribution).

600A (1494V-DS600/DSX600 series): Supports direct bolt fixation of Class J fuses, or can be paired with independently installed fuse blocks (1491-N621/R621 series); The accessories are compatible with the 400A kit and are mainly used in high-power scenarios such as large factories and data center power isolation.