NIPSCO ER 3-110-G Cabinet Current Transformer Instructions

ER 3-110-G Cabinet Current Transformer

Product Information

Specifications:

• Product Name: CABINET – CURRENT TRANSFORMER
  Indoor – Outdoor

• Voltage: 240 Volts

• Amperes: 800 Amperes Maximum

• Model Number: ER 3-110-G

Product Usage Instructions:

Cabinet Material and Design:

The cabinet is made of minimum 0.10 aluminum or 14-gauge steel
with an enamel finish. The front door or cover is hinged on the
right side and equipped with a sealing device for security.

Connections:

Line connections should be made on the top connection plate,
while load connections should be made on the bottom connection
plate. Ensure proper connection of cables as per the provided
guidelines.

Lugs and Neutral Connection:

The cabinet includes lugs for cable terminal connections. The
neutral connection plate is made of copper or aluminum and is
drilled and tapped for easy installation of cable lug bolts.

Knockouts and Hubs:

Size and location of knockouts/hubs should be determined by the
customer when required for specific installations. Follow
guidelines for proper sizing and placement.

FAQ (Frequently Asked Questions):

Q: What is the maximum voltage and amperage this cabinet can

handle?

A: The cabinet is rated for a maximum of 240 Volts and 800
Amperes.

Q: Can this cabinet be used for outdoor installations?

A: Yes, this cabinet is suitable for both indoor and outdoor
installations. For outdoor use, an additional vent kit is
required.

®
A NiSource Company
Electric Rules Standard

CABINET – CURRENT TRANSFORMER Indoor – Outdoor
240 Volts – 800 Amperes Maximum

ER 3-110-G
PAGE 1 OF 5
Published: 04-01-24 Reaffirmed: 04-01-24

USE : For commercial and industrial installations, purchased and installed by customer. To enclose 600 volt insulation class current transformers on indoor or outdoor meter installations. For installing two or three each of voltage and
current transformers with provisions to by-pass, remove, or replace while energized.

STANDARD ORIGINATED 03-94

PREVIOUS STANDARD REVISION 01-01-18

PREVIOUS STANDARD NUMBERS ER 15-466-A (07-14-88)

REVISION SUMMARY: Convert to current format. Emphasize Erickson cabinets intended for outdoor use require additional purchase of vent kit.

REFERENCE(S): (All references are latest revision; unless noted) National Standard(s) a. National Electrical Code® (NEC®) 408.56: Minimum Spacings b. NEC 408.58: Panelboard Marking
SPECIFICATIONS:
1. GENERAL: 1.1. Cabinets shall meet all requirements of the above-referenced specifications, where applicable, unless otherwise noted below. 1.2. All current carrying parts shall be designed on the basis of 1,000 amperes per square inch capacity for copper and 700 amperes per square inch for aluminum. 1.3. All dimensions shown are minimum. 1.4. Spacing between opposite polarity live parts and between live parts and ground mounted on the same surface not over 600 volts shall be a minimum of two inches and one inch, respectively. 1.5. Cabinets shall be marked by manufacturer with voltage, current rating, number of phases for which they are designed, and manufacturer’s name or trademark so as to be visible after installation, without disturbing interior parts or wiring. 1.6. For use on 3-phase 3-wire 480-volt delta and 3-phase 4-wire 480Y/277 volt; 800 amperes maximum.

Denotes Revision

Document is considered current only when viewed electronically on Company’s Intranet.

®
A NiSource Company
Electric Rules Standard

CABINET – CURRENT TRANSFORMER Indoor – Outdoor
240 Volts – 800 Amperes Maximum

ER 3-110-G
PAGE 2 OF 5
Published: 04-01-24 Reaffirmed: 04-01-24

2. CABINET:
2.1. Material: Minimum 0.10″ aluminum or 14-gauge steel with enamel finish
2.2. Front door or cover shall be hinged on the right (looking from the front of the cabinet) and equipped with sealing device that ensures one padlock seal will effectively prevent door or cover from opening.
2.3. Each line and load lug provided will accept one 600 KCM-#4 or two 350 KCM-1/0 copper or aluminum conductors. Two lugs are provided per phase as shown in Figure 2.5, line and load. Each line and load neutral lug provided will accept two 600 KCM-#4 or four 350 KCM-1/0 copper or aluminum conductors.
2.4. Minimum Dimensions:

Width (in)

W/O

With

Insulator Insulator

Barriers Barriers

28-1/2

24

Table 2.4

2.5. Configuration: 24.0″

14.0″ A

Line Side

48.0″

8.0″ Deep Line and Load Lug
A
CT Configurations Per SECTION 3

Vent Kit is Required by NIPSCO for Outdoor Erickson Cabinet
Type 3R Aluminum Enclosure

A

B

CN

14.0″

Load Side

Vault Handle With Sealing
Device

Nameplate

Front Interior View

Equipment Grounding

Front Enclosed View

Denotes Revision

Figure 2.5
Document is considered current only when viewed electronically on Company’s Intranet.

®
A NiSource Company
Electric Rules Standard

CABINET – CURRENT TRANSFORMER Indoor – Outdoor
240 Volts – 800 Amperes Maximum

ER 3-110-G
PAGE 3 OF 5
Published: 04-01-24 Reaffirmed: 04-01-24

2.6. Connections: 2.6.1. Line connections shall be made on top connection plate. 2.6.2. Load connections shall be made on bottom connection plate.
2.7. Current Transformer (CT) Primary Connection Plate: 2.7.1. Material: 1/4″ × 4″ × 5″ copper or 1/4″ × 5″ × 5″ aluminum. 2.7.2. Drilled and tapped for current transformer, cable lug, and by-pass jumper bolts. 2.7.3. Drawing shows six plates for mounting three 600 bolt class current transformers. When only two current transformers are required, omit neutral and provide center phase link.
2.8. Neutral Connection Plate: 2.8.1. Material: Copper or aluminum, 24″ or 28-1/2″ cabinet 2.8.2. Drilled and tapped for cable lug bolts, #10-24 potential tap screw, and mounting bolts.
2.9. Mounting Bolts: 2.9.1. For CT’s: 2.9.1.1. Material: Steel, zinc-plated, 1/2″ – 13 thread × 2-1/2″ long with flat washer and hex head nut 2.9.1.2. Eight required for two CT’s / 12 required for three CT’s 2.9.2. For Terminal Lug: 2.9.2.1. Material: Steel, zinc-plated, 1/2″ – 13 thread × 2-1/2″ long with flat washer and hex head nut 2.9.2.2. Six required for two CT’s / eight required for three CT’s 2.9.3. For Terminal Lug and Bypass Jumper: 2.9.3.1. Material: Steel, zinc-plated, 1/2″ – 13 thread × 3″ long with flat washer and hex head nut 2.9.3.2. Four required for two CT’s / six required for three CT’s 2.9.4. For Two Hole Terminal Lugs on Neutral Plate: 2.9.4.1. Material: Steel, zinc-plated, 1/2″ – 13 thread × 3″ long with flat washer and hex head nut 2.9.4.2. Two Required 2.9.5. For Insulator Bus: 2.9.5.1. Material: Steel, zinc-plated, 1/4″ – 20 × 2-1/2″ 2.9.5.2. Eight Required 2.9.6. For Potential Tap in Neutral Plate: 2.9.6.1. Material: Steel, zinc-plated, #10 – 24 × 1/2″ with washer 2.9.6.2. One required
2.10. Lugs: 2.10.1. Two-hole cable terminal lug furnished for two 500 KCM or larger copper conductors per phase 2.10.2. Six required for two CT’s / eight required for three CT’s
2.11. Knockouts / Hubs: 2.11.1. Size and location by customer when required.

Denotes Revision

Document is considered current only when viewed electronically on Company’s Intranet.

®
A NiSource Company
Electric Rules Standard

CABINET – CURRENT TRANSFORMER Indoor – Outdoor
240 Volts – 800 Amperes Maximum

ER 3-110-G
PAGE 4 OF 5
Published: 04-01-24 Reaffirmed: 04-01-24

3. CT MOUNTING AND BYPASS:
3.1. CT’s, lug landing pads, and neutrals shall be rated at 400 amps. 3.2. CT’s provided by NIPSCO.
3.3. Line and load lug provided shall accept one 600 KCM – #4 or two 350 KCM – 1/0 copper or aluminum conductors. Two lugs provided per phase and neutral as shown in Section 3.4, line and load. One additional lug can be added without modification.
3.4. Configurations:

24.0″

8.0″ (240V) or
11.0″ (480V)
3.25″ Line 1.75″
7.38″ Load 1.75″
3.25″ Line 1.75″
7.38″ Load 1.75″
Denotes Revision

3.75″

Section A-A

6.0″ 6.0″

8.75″

Enclosure Figure 3.4-1
Line and Load Lug

Potential Tap May Be Moved to Opposite Location If Required

3-Phase – 3-Wire Front View

6.0″ 6.0″

8.75″

Current Transformers Provided By NIPSCO
Figure 3.4-2
Line and Load Lug

10.88″ Side View

Potential Tap May Be Moved to Opposite Location If Required

10.88″

Current

Transformers

Provided By

3-Phase – 4-Wire

NIPSCO

Side View

Front View

Figure 3.4-3

Less Neutral

Document is considered current only when viewed electronically on Company’s Intranet.

®
A NiSource Company
Electric Rules Standard

CABINET – CURRENT TRANSFORMER Indoor – Outdoor
240 Volts – 800 Amperes Maximum

ER 3-110-G
PAGE 5 OF 5
Published: 04-01-24 Reaffirmed: 04-01-24

4. OUTDOOR CABINET 4.1. Door or front cover shall be rain-tight; top shall be protected with rain shield. 4.2. NIPSCO requires vendor-specific vent kit be purchased and installed per vendor specification on Erickson cabinets intended for outdoor use. 4.3. All conduit shall enter cabinet through sides, bottom, or rain-tight top hub. 4.4. All hardware shall be rust resistant.

5. APPROVED MANUFACTURERS:

Manufacturer

Phases Wires

Number of CT’s

Catalog Number Indoor / Outdoor

Erickson Electrical Equipment 1 or 3

3

2

283-1 (Note 1)

475 Bonnie Ln.

Elk Grove Village, Illinois

3

4

3

283-2 (Note 1)

1

3

2

Milbank Manufacturing Co.

4801 Deramus

3

3

2

Kansas City, Missouri 64141

3

4

3

NIPM-813 NIPM-833 NIPM-834

Note-1: For outdoor cabinets, Erickson cabinets require purchase and installation of a vent kit. Milbank cabinets do not require additional vent kit.

Table 5

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