Section Cover Page
Section 26 18 16
Overcurrent Protective Devices
2010-11-01
Use this Section to specify all requirements related to overcurrent protective devices up to 600 V, i.e.
breakers and fuses mounted in panelboards, switchboards, distribution centres, motor control centres
or in individual EEMAC enclosures.
This Master Specification Section contains:
.1
This Cover Sheet
.2
Data Sheet – Reference Documents
.3
Specification Section Text:
1.
1.1
1.2
1.3
1.4
1.5
General
Related Requirements
Reference Documents
Product Data
Source of Supply
Delivery, Storage and Handling
2.
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
Products
Moulded Case Circuit Breakers - General
Branch Moulded Case Circuit Breakers
Feeder Moulded Case Circuit Breakers
Current Limiting Moulded Case Circuit Breakers
Magnetic Trip Moulded Case Circuit Breakers
Solid State Trip Moulded Case Circuit Breakers
Mini Circuit Breakers
Industrial Air Circuit Breakers
Fuses
Ground Fault Protection
3.
3.1
3.2
Execution
Installation
Testing and Adjusting
BMS Basic Master Specification
Alberta Infrastructure
Master Specification System
Page 0
Section 26 18 16
Overcurrent Protective Devices
Page 1
Plan No:
Project ID:
1.
General
1.1
RELATED REQUIREMENTS
.1
.2
.3
.4
.5
.6
.7
.8
.9
.10
.11
1.2
Submittal Procedures:
LEED Requirements:
Waste Management and Disposal:
Electrical General Requirements:
Electrical Spare Parts and Maintenance Materials:
Electrical Identification:
Moulded Case Main Distribution Centre:
Industrial Air Circuit Breaker Distribution Centres:
Distribution Panelboards:
Branch Circuit Breaker Panelboards:
Motor Starters:
Section 01 33 00.
Section 01 35 18.
Section 01 74 19.
Section 26 00 10.
Section 26 01 90.
Section 26 05 53.
Section 26 18 37.
Section 26 18 38.
Section 26 24 16.
Section 26 24 17.
Section 26 29 13.
REFERENCE DOCUMENTS
.1
1.3
Canadian Standards Association (CSA)
.1
CAN/CSA-C22.2
No. 5.1-M91 (R2001)
Moulded Case Circuit Breakers
.2
CSA C22.2 No. 59.1M1987 Am 2
Fuses (Both Plug and Cartridge - Enclosed Types)
.3
CAN/CSA-C22.2
HRC Fuses
No. 106-M92 (R2001)
PRODUCT DATA
.1
Comply with requirements of Section 26 00 10.
.2
Provide manufacturer's product data for all devices.
.3
Provide following information:
2010-11-01 BMS Version
.1
Time current characteristic curves on full size (280 mm x 432 mm) log-log
time/current graph paper.
.2
Fault interrupting capability of each device in symmetrical amperes at applied
voltage.
.3
Time current curves for all circuit breaker overload, overcurrent and ground
current tripping devices.
.4
Relay current transformer ratios, accuracy class and current sensor tap ranges.
Section 26 18 16
Overcurrent Protective Devices
Page 2
Plan No:
Project ID:
.5
Motor control overcurrent protective device characteristics and curves.
SPEC NOTE: Following clauses apply when fuses are incorporated in the system.
1.4
.6
Current limiting let-through information for HRC fuses in graph form.
.7
Minimum melting and maximum clearing time/current curves for HRC fuses.
SOURCE OF SUPPLY
.1
Supply all overcurrent protective devices in each of the following categories by a single
manufacturer:
.1
.2
.3
1.5
Moulded case circuit breakers.
Industrial air circuit breakers.
Fuses.
DELIVERY, STORAGE AND HANDLING
.1
Separate waste materials for [reuse] [and] [recycling] in accordance with Section
01 74 19 - Waste Management and Disposal.
2.
Products
2.1
MOULDED CASE CIRCUIT BREAKERS - GENERAL
.1
2.2
Moulded Case Circuit Breakers: to CAN/CSA-C22.2 No. 5.1.
BRANCH MOULDED CASE CIRCUIT BREAKERS
.1
Trip Type: thermal/magnetic.
.2
Voltage: as indicated in schedules.
.3
Poles: as indicated in schedules.
.4
Interrupting Capacity: [10,000] [ ] amperes, [asymmetrical] [symmetrical].
.5
Mounting: [bolt-in] [plug-in] any position.
.6
Normal operation: in [40] [ ] °C ambient.
2010-11-01 BMS Version
Section 26 18 16
Overcurrent Protective Devices
Page 3
Plan No:
Project ID:
.7
Features:
.1
.2
.3
.4
.5
2.3
[Thermal and instantaneous magnetic trip.]
[Magnetic trip only].
Trip free, toggle type operation.
Quick-make, quick-break action.
Positive handle trip indication.
Trip rating visible with panel trim installed.
FEEDER MOULDED CASE CIRCUIT BREAKERS
.1
Trip Type: thermal/magnetic.
.2
Voltage: as indicated in schedules.
.3
Poles: as indicated in schedules.
.4
Interrupting Capacity: [18,00] [ ] amperes, symmetrical.
.5
Mounting: [bolt-in] any position.
.6
Normal operation: in [40] [ ] °C ambient.
.7
Features:
.1
.2
.3
.4
.5
2.4
Thermal and instantaneous magnetic trip.
Trip free, toggle type operation.
Quick-make, quick-break action.
Positive handle trip indication.
Trip rating visible with panel trim installed.
CURRENT LIMITING MOULDED CASE CIRCUIT BREAKERS
.1
Voltage: as indicated in schedules.
.2
Poles: as indicated in schedules.
.3
Interrupting Capacity: [100] [200] kA symmetrical.
.4
Mounting: [bolt-in] vertical or horizontal plane.
.5
Normal operation: in [40] [ ] °C ambient.
2010-11-01 BMS Version
Section 26 18 16
Overcurrent Protective Devices
Page 4
Plan No:
Project ID:
.6
Features:
.1
.2
.3
.4
2.5
Current limiting elements replaceable type, accessible without removing breaker.
Thermal, magnetic and high fault interrupting elements.
Trip free, toggle type operation.
Positive On, Off, trip indication.
MAGNETIC TRIP MOULDED CASE CIRCUIT BREAKERS
.1
Voltage: as indicated in schedules.
.2
Poles: as indicated in schedules.
.3
Interrupting Capacity: [10] [18] [22] [200] kA symmetrical.
.4
Mounting: wired connection, any position.
.5
Features:
.1
.2
.3
.4
2.6
Trip free, toggle type operation.
Positive On, Off trip indication.
Magnetic overcurrent trip element.
[Current limiting high fault level interrupting element.]
SOLID STATE TRIP MOULDED CASE CIRCUIT BREAKERS
.1
Voltage: as indicated in schedules.
.2
Poles: 3 pole operating unit.
.3
Interrupting Capacity: [22] [25] [35] [40] [50] [65] [100] kA [symmetrical].
schedules for symmetrical interrupting rating.]
.4
Construction: [bolt-in] [wired connection] [withdrawable].
.5
Mounting: [vertical] [horizontal].
.6
Normal operation: in [40] [ ] °C ambient.
.7
Breaker frame: moulded case breaker design.
2010-11-01 BMS Version
[See
Section 26 18 16
Overcurrent Protective Devices
Page 5
Plan No:
Project ID:
.8
Current monitors:
.1
.2
.3
Type: [transformer] [
].
Mounting: [bus] [frame].
Number required: [3] [4] wire system.
SPEC NOTE: 3 monitors required for 3 wire system and 4 monitors required for 4 wire system.
.9
Sensor Unit:
.1
.2
.3
.4
.5
.6
2.7
Type: solid state electronic sensor powered from current monitor source.
Calibration: visible identified trip adjustment/calibration from front of breaker.
Mounting: on breaker frame.
Trip Actuation: powered by circuitry within the monitor sensor device.
Trip Actuation: visual On/Off.
Adjustments:
.1
Long delay pickup.
.2
Long delay time.
.3
[Short delay pickup.]
.4
[Short delay time]
.5
Instantaneous trip.
.6
[Ground fault pickup.]
.7
[Ground fault delay time.]
.8
[Ground fault restraining signal.]
MINI CIRCUIT BREAKERS
SPEC NOTE: Mini breakers are single pole pushbutton or toggle operated, used for component
protection in factory assembled electrical equipment.
.1
[Thermal/magnetic] [Thermal] trip.
.2
Voltage: 250 volts AC maximum.
.3
Poles: Single only.
.4
Interrupting Capacity: 2000 Amperes.
.5
Construction: panel mount.
.6
Mounting: Any position.
.7
Normal operation: In [25] [ ] °C ambient.
2010-11-01 BMS Version
Section 26 18 16
Overcurrent Protective Devices
Page 6
Plan No:
Project ID:
.8
Features:
.1
.2
2.8
Trip free mechanism.
Maximum ampacity: 200 Amperes.
INDUSTRIAL AIR CIRCUIT BREAKERS
.1
Industrial Air Circuit Breakers: to CAN/CSA C22.2 No. 5.1 and IEEE No. 20 1973.
.2
Interrupting Rating: [30] [42] [50] [65] [85] kA symmetrical at [
.3
Frame: non magnetic metal frame, complete with frame ground, 3 or 4 pole. Frame size
as per schedule.
.4
Contacts: high pressure segment type with arcing auxiliary.
.5
Arc Chutes: non combustible, removable, blowout design.
.6
Mechanism: stored energy quick make, quick break.
.7
Operation: [manual] [electric] close, trip operator clearly labelled.
.8
Indicator: open/close visual indicator. Dead front design.
.9
Phase isolation with interphase insulated barriers.
.10
Automatic Trip Unit: solid state consisting of current monitors and sensor unit.
Self-powered. Operating temperature -40° to +55°C.
.11
Auxiliary Contacts: two Form C.
.12
Current monitors: [transformer] [induction]] type mounted on breaker frame.
setting or monitor rating to be shown on front of breaker.
.13
Sensor Unit:
.1
.2
.3
.4
.5
2010-11-01 BMS Version
] volts AC.
Tap
Type: solid state electronic sensor powered from current monitor source.
Calibration: visible identified trip adjustment/calibration from front of breaker.
Mounting: on breaker frame.
Trip Actuation: powered by circuitry within the monitor sensor device.
Trip Indication: visual On/Off.
Section 26 18 16
Overcurrent Protective Devices
Page 7
Plan No:
Project ID:
.6
Adjustments:
.1
Long delay pickup.
.2
Long delay time.
.3
[Short delay pickup.]
.4
[Short delay time.]
.5
Instantaneous trip.
.6
[Ground fault pickup.]
.7
[Ground fault delay time.]
.8
[Ground fault restraining signal.]
.14
Spring charging circuit: [ ] volts [AC] [DC].
.15
Drawout circuit breakers equipped with:
.1
.2
.3
.4
.5
.6
.7
.16
Current Limiting Type Circuit Breakers equipped with:
.1
.2
.3
.4
.17
Self-storing supporting rails.
Primary multi-segment silverplated contacts. Fixed stationary contacts in
switchgear. Segments contacts on breaker frame.
Self-aligning rails and primary contacts.
Safety interlocks to prevent withdrawing or inserting breaker while in closed
position.
Secondary auxiliary contacts.
Racking tools and/or devices.
Engaged, test, and withdrawn position indicator.
HRC fuse type elements mounted on breaker frame or carriage.
Drawout type.
Single phasing prevention.
Blown fuse indicator.
Accessories:
.1
.2
.3
.4
.5
.6
.7
.8
[Open/Close indicating pilot lights.]
[Remote control terminals.]
[interlocking terminals.]
[Alarm contacts.]
[Breaker control switch type.]
[overload lockout and reset.]
[Door interlock.]
[
]
SPEC NOTE: Specify operating power supply for electricity operated circuit breakers.
2010-11-01 BMS Version
Section 26 18 16
Overcurrent Protective Devices
Page 8
Plan No:
Project ID:
2.9
FUSES
SPEC NOTE: For all installations that incorporate fuses, specify in Section 26 01 90 one set of spare
fuses of each size used in installation.
.1
Plug and Cartridge Standard (STD) Fuses: to CSA-C22.2 No. 59.1 and as follows:
.1
Standard fuse interrupting ratings: 10 kA symmetrical.
.2
HRC fuses: to CAN/CSA-C22.2 No. 106 and as follows:
.1
.2
2.10
HRC fuse interrupting ratings: 200 kA symmetrical.
HRC fuse types:
.1
HRCI-J non-time delay.
.2
HRCI-J time delay.
.3
HRCI-R non-time delay.
.4
HRCI-R time delay.
.5
HRCII-C (motor protection only).
.6
HRC-L non-time delay.
.7
HRC-L time delay.
.3
Voltage: as indicated in schedules.
.4
Ampacity: as indicated in schedules.
.5
Fuse Types: as indicated [in schedules] [on drawings].
GROUND FAULT PROTECTION
.1
.2
2010-11-01 BMS Version
System:
.1
Provide line-to-ground fault protection as an integral part of breakers.
.2
Develop time bands, pickup points and time settings [and restraining systems] of
ground fault relay[s] as part of system overall coordination.
Components:
.1
Ground fault protection shall form an integral part of solid state overcurrent relay
device utilized on breaker[s].
.2
Unit complete with pilot light to indicate ground fault trip.
Section 26 18 16
Overcurrent Protective Devices
Page 9
Plan No:
Project ID:
.3
Ground fault relays complete with the following:
.1
Adjustable pickup points: [3] [ ].
.2
Time band settings: [4] [ ].
.3
Restraining signal: 0.1 to 5 seconds.
SPEC NOTE: Use restraining signal system only when a multiple number of breakers incorporate
ground fault protection.
3.
Execution
3.1
INSTALLATION
.1
Install overcurrent protective devices as indicated, in accordance with manufacturer's
written instructions.
.2
Fasten overcurrent protective devices without causing mechanical stresses, twisting or
misalignment of equipment in final position.
.3
Set field-adjustable trip settings as indicated subsequent to installation.
.4
Overcurrent protective device sizes and identification as specified in respective
equipment schedules.
3.2
TESTING AND ADJUSTING
.1
Comply with requirements of Section 26 08 10.
END OF SECTION
2010-11-01 BMS Version