Omega Products AU-1B05UR User Manual

Supplementary CirCuit proteCtorS

ul 1077 for equipment, lighting and Control CirCuitS

UR Series

AU-3B30UR 3-pole

supplementary protector,

• DIN Rail Mounted

• 17.5 mm Width per Pole

• Thermal Magnetic,

Current Limiting

• 0.5-60A, 480 Y/277 Vac 50/60 Hz

• 10kA Short Circuit

Interrupting Capacity

• Box Clamp or Ring Tongue

Wire Connection

While UL 489 branch circuit breakers protect feeder or branch circuits, UR Series UL 1077 supplementary protectors are made to trip faster than a standard UL 489 circuit breaker, therefore providing additional protection for speciﬁc devices. Supplementary protectors provide critical protection in applications where branch circuit protection is not required, or is already provided by a separate device. These breakers are installed on the load side of the branch circuit and are typically used to safeguard control circuits, lighting, business equipment, appliances and a range of other applications.

UR Series supplementary protectors are available in one‑, two‑, and three‑pole conﬁgurations and up to 21 different current ratings from 0.5A to 60A and can safely be used in applications up to 480Y/277 Vac with a 10 kA short circuit withstand rating (see table on next page for backup fuse requirements). Three different trip characteristics, including B, C and D curves, give you the ability to conﬁgure the exact protection scheme you require. These supplementary protectors are DIN rail mounted and at only 17.5 mm (0.69") wide, they are extremely compact and help to reduce panel size.

Accessories are ﬁeld mounted on these supplementary protectors for enhanced control and monitoring capabilities. Field mounting kits include all necessary parts and instructions. Accessories can be gang mounted on a single controller (the auxiliary switch in the outside position). The mounting arrangement links the internal latch‑pins for the tripping mechanisms, ensuring simultaneous trips. Handles are linked to simplify manual resetting. Accessories include neutral pole, shunt and undervoltage trip and auxiliary contacts.

30 Amp B-trip curve.

For Terminal

Blocks and Enclosures. Visit omega.com/auto

Applications

B-Trip Protectors

Include business equipment, wiring protection, lighting, appliances, control circuits and some electronic applications. Relatively long thermal trip delay but low magnetic trip point.

C-Trip Protectors

Include lighting, wiring protection, appliances, business equipment, and control circuit applications. Relatively long thermal trip delay and medium magnetic trip point.

D-Trip Protectors

Include control transformers, power supplies and reactive loads. Relatively long thermal trip delay and very high magnetic trip point.

DIN rail sold separately. Visit omega.com/drtb-rail

AU-1B10UR 1-pole supplementary protector, 10Amp B-trip curve.

SPECIFICATIONS

3 Pole

(1.38)

74.7

(2.94)

93.3

(3.67)

52.5

(2.07)

2 Pole 3 Pole

(1.38)

74.7

(2.94)

(1.38)

93.3

(3.67)

52.5

(2.07)

68.4 (2.69)

6.5 44 (1.73)

(1.77)

Voltage Rating: 480Y/277 Vac Short Circuit Withstand Rating

(UL - Ratings):

0.5-6A (RC): 10kA with no back‑up fuse 8-60A (RC): 10kA with UL‑listed Class J

back‑up fuse; 5kA with no back‑up fuse

Calibration Temperature: 30°C (86°F) Operating Temperature: ‑25 to 55°C

(‑13 to 131°F) Storage Temperature: ‑40 to 70°C

(‑40 to 158°F)

Dimensions: mm (inch)

1 Pole

89.3

(3.52)

2 Pole

SHORT CIRCUIT WITHSTAND RATINGS FOR SUPPLEMENTRY PROTECTORS

UL-Listed Class J FUSE NO BACKUP TRIP CURVE Amp RANGE UP TO 10 kA FUSE REQUIRED

All 0.5 to 10 A 70 A 10kA All 12 to 60 A 4x RC

Up to rated current.

Terminal Size Acceptability: Top: 18‑3 AWG

Bottom: 18‑2 AWG Tightening Torque: 25 lb‑in. (2.8 Nm) Terminal Protection Degree: IP20 Vibration Resistance: >15 g (18 to 50 Hz) Mechanical Life: 6000 on/off cycles

3 Pole

BACKUP PROTECTION

* 5kA

Electrical Life: 10,000 on/off cycles Dimensions:

Height: 89.3 mm (3.52") Width:

One Pole: 17.5 mm (0.69") 2 Pole: 35 mm (1.38") 3 Pole: 52.5 mm (2.07")

Depth: 74.9 mm (2.95")

(1.77)

17.5

(0.69)

(1.38)

52.5

(2.07)

(0.26)

Trip-Characteristics* Applications

Characteristic Trip Boundaries

Thermal Trip

Must not

Trip>100ms

Must Trip

<1hr

B-Characteristics

1.13xRC1.45xRC 3xRC 5xRC

Magnetic Trip

Must not

Trip>100ms

Must Trip

at 100ms

C-Characteristics

1.13xRC1.45xRC 5xRC 10xRC

Lighting

Wiring

Protection

Control

Circuits

Business

Equipment

Appliances

Control

Transformers

6.5

Power

Supplies

Side view

General

Electronics

44 (1.73)

68.4 (2.69)

Reactive

Load

D-Characteristics

1.13xRC1.45xRC 10xRC 20xRC

The value of each characteristic is shown vertically beneath its corresponding heading.

Warning!

This information should only be used as a selection guide. The use of a miniature circuit Breaker/supplementary protector in an application with a certain Trip Characteristic always requires prototype testing! It is the responsibility of the circuit design engineer to select the appropriate miniature circuit breaker/supplementary protector for his specific application.

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