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Effective : January 1997
Supersedes 41-100I, Dated January 1990
( | ) Denotes Change Since Previous Issue
®
File No. E103204
!
Before putting relays into service, remove all
blocking which may have been inserted for the
purpose of securing the parts during shipment,
make sure that all moving parts operate freely,
inspect the contacts to see that they are clean
and close properly, and operate the relay to
check the settings and electrical connections.
The following describes typical applications of the CO Relay:
RELAY
TIME
TYPE
CURVE
CO-2
Short
CO-5
Long
CO-6
Definite
CO-7
Moderately Inverse
CO-8
Inverse
CO-9
Very Inverse
CO-11
Extremely Inverse
All possible contingencies which may arise during installation, operation or maintenance, and all details and
variations of this equipment do not purport to be covered by these instructions. If further information is desired
by purchaser regarding this particular installation, operation of maintenance of this equipment, the local Asea
Brown Boveri representative should be contacted.
Courtesy of NationalSwitchgear.com
ABB Power T&D Company Inc.
Power Automation & Protection Division
Coral Springs, FL 33065
CAUTION
1) Differential protection where saturation of current transformers is not ex-
pected, or where delayed tripping is permissible.
2) Overcurrent protection, phase or ground, where coordination with down-
stream devices is not involved and 2 to 60 cycle tripping is allowable.
Motor locked rotor protection where allowable locked rotor time is
approximately between 10 and 70 seconds.
Overcurrent protection where coordination with downstream devices is not
involved and CO-2 is too fast. The operating time of this relay does not vary
greatly as current level varies.
1) Overcurrent protection where coordination with other divices are re-
quired, and generation varies.
2) Backup protection for relay on other circuits.
1) Motor Protection where allowable locked rotor time is less than 10 sec.
2) Overcurrent protection where coordination with fuses and reclosers is in-
volved, or where cold load pickup or trnsformer inrush are factors.
Type CO (HI-LO)
Overcurrent Relay
1.
APPLICATION
The CO Relay is a single phase non-directional
time overcurrent device. It is used to sense current
level above the setting and normally is used to trip
a circuit breaker to clear faults. A wide range of
characteristics permit applications involving coordi-
nation with fuses, reclosers, cold load pickup, motor
starting, or essentially fixed time applications. AC
trip applications are described, but they are not rec-
ommended except in applications where a fault will
not reduce the ac voltage below a level at which
tripping will be reliable.
TYPICAL APPLICATIONS
Instruction Leaflet
41-100J
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Related Manuals for ABB CO
Summary of Contents for ABB CO
- Page 1 10 and 70 seconds. Overcurrent protection where coordination with downstream devices is not CO-6 Definite involved and CO-2 is too fast. The operating time of this relay does not vary greatly as current level varies. CO-7 Moderately Inverse 1) Overcurrent protection where coordination with other divices are re- quired, and generation varies.
-
Page 2: Construction And Operation
The electromagnets for the types CO-5, CO-6, CO- clapper type device. A magnetic armature, to which 7, CO-8 and CO-9 relays have a main tapped coil lo- leaf-spring mounted contacts are attached, is at- cated on the center leg of an "E" type laminated... -
Page 3: Installation
Notes: (1) This is the voltage range which will operate the ACS coil only. (2) When connected as a current switch in series with a full Since the tap block screw on both the CO unit rated voltage relay or trip coil. and IIT unit carries operating current, be sure that the screws are turned tight. -
Page 4: Adjustments & Maintenance
20 amperes setting use the 20 to 40 tap rather Table I, (e.g. for the CO-8, 2 and 20 times tap value than the 6 to 20 tap. current) and measure the operating time of the relay. - Page 5 I.L. 41-100J The .5 to 2.5 amp relay and all CO-2 relays should at approximately the same instant. Position the sta- be set on the lowest tap. The 1 to 12 amp relay tionary contact for a minimum of 1/32" wipe. The...
- Page 6 1-2 amp relay on the 2 amp tap setting. Indicating Contactor Switch (ICS) Set the 1-12 amp CO-2 on the 1 amp tap. Set time Close the main relay contacts and pass sufficient dc dial position 6 on all relays.
-
Page 7: Renewal Parts
CO-9 8..87 CO-11 11.27 ELECTROMAGNET PLUGS CO-2 0.22 CO-5 14.30 CO-6 1.19 CO-7 1.11 CO-8 1.11 CO-9 0.65 ∆ CO-11 0.24 ∆ For 50 Hz. CO-11 relay 20 times operating time limits are 0.24 + 20% -5%. Courtesy of NationalSwitchgear.com... - Page 8 I.L 40-100J Courtesy of NationalSwitchgear.com...
-
Page 9: Energy Requirements
.007 .007 .007 .007 NOTE 1. 50 Hz values for Z and OHMS are 96% to 100% of 60 Hz Values. CO-2 SHORT TIME RELAY ∆ 60 HERTZ VOLT AMPERES**(x FOR 50 HZ) AT 3 TIMES AT 10 TIMES AT 20 TIMES... - Page 10 I.L 40-100J ENERGY REQUIREMENTS CO-5 LONG TIME AND CO-6 DEFINITE MINIMUM TIME RELAYS ∆ 60 HERTZ VOLT AMPERES**(x FOR 50 HZ) AT 3 TIMES AT 10 TIMES AT 20 TIMES ANGE RATING RATING FACTOR TAP VALUE TAP VALUE TAP VALUE...
- Page 11 I.L. 41-100J ENERGY REQUIREMENTS CO-8 INVERSE TIME AND CO-9 VERY INVERSE TIME RELAYS ∆ 60 HERTZ VOLT AMPERES**(x FOR 50 HZ) AT 3 TIMES AT 10 TIMES AT 20 TIMES AMPERE CONTINUOUS ONE SECOND POWER TAP VALUE TAP VALUE TAP VALUE...
- Page 12 I.L 40-100J INDICATING CONTACTOR SWITCH INDUCTION UNIT RED HANDLE TEST SWITCH CURRENT TEST JACK CHASSIS OPERATED SHORTING SWITCH TERMINAL Sub 3 57D4524 Figure 1. Internal Schematic of the Double Trip Relay Without IIT Courtesy of NationalSwitchgear.com...
- Page 13 I.L. 41-100J Sub 1 3498A03 Figure 2. Internal Schematic of the Double Trip Relay With IIT Courtesy of NationalSwitchgear.com...
- Page 14 I.L 40-100J Sub 3 57D4523 Figure 3. Internal Schematic of the Single Trip Relay Without IIT Courtesy of NationalSwitchgear.com...
- Page 15 I.L. 41-100J Sub 1 3498A02 Figure 4. Internal Schematic of the Single Trip Relay With IIT Courtesy of NationalSwitchgear.com...
- Page 16 I.L 40-100J Sub 1 3508A73 Figure 5. Internal Schematic of Double Trip Relay With ITT to Separate Terminals Courtesy of NationalSwitchgear.com...
- Page 17 I.L. 41-100J Sub 2 3516A07 Figure 6. Internal Schematic of the Single Trip Relay With ITT Contacts Wired to Two Separate Terminals Courtesy of NationalSwitchgear.com...
- Page 18 I.L 40-100J Sub 6 183A608 Figure 7. Internal Schematic of the Single Trip Relay With an ACS Unit Courtesy of NationalSwitchgear.com...
- Page 19 I.L. 41-100J Sub 4 3515A06 Figure 8. Internal Schematic of the Single Trip Relay With an ACS Unit and IIT Courtesy of NationalSwitchgear.com...
- Page 20 I.L 40-100J Sub 1 3524A37 Figure 9. Internal Schematic of the Single Trip Relay With an ACS Unit and with IIT Contacts Wired to Two Separate Terminals Courtesy of NationalSwitchgear.com...
- Page 21 I.L. 41-100J MULTIPLES OF TAP VALUE Curve 619584 Figure 10. Typical Time Curve of the Type CO-2 Relay Courtesy of NationalSwitchgear.com...
- Page 22 I.L 40-100J Curve 418245 Figure 11. Typical Time Curve of the Type CO-5 Relay Courtesy of NationalSwitchgear.com...
- Page 23 I.L. 41-100J Curve 418246 Figure 12. Typical Time Curve of the Type CO-6 Relay Courtesy of NationalSwitchgear.com...
- Page 24 I.L 40-100J Curve 418247 Figure 13. Typical Time Curve of the Type CO-7 Relay Courtesy of NationalSwitchgear.com...
- Page 25 I.L. 41-100J Curve 418248 Figure 14. Typical Time Curve of the Type CO-8 Relay Courtesy of NationalSwitchgear.com...
- Page 26 I.L 40-100J Curve 418249 Figure 15. Typical Time Curve of the Type CO-9 Relay Courtesy of NationalSwitchgear.com...
- Page 27 I.L. 41-100J Sub 2 288B655 Figure 16. Typical Time Curve of the Type CO-11 Relay Courtesy of NationalSwitchgear.com...
- Page 28 Figure 17. External Schematic of HiLo CO Relay for Phase and Ground Overcurrent Protection on a Three Phase System Sub 1 3527A93 Figure 18. External Schematic of HiLo CO Relay with ACS Unit for Phase and Ground Protection on a Three Phase System Courtesy of NationalSwitchgear.com...
- Page 29 I.L. 41-100J Sub 3 3503A43 Figure 19. Siagram of Test Connections for the Type CO Relay Courtesy of NationalSwitchgear.com...
- Page 30 SINGLE TRIP WITH IIT CONTACTS WIRED 3516A07 TO TWO SEPARATE TERMINALS 1-12 2-48 SINGLE TRIP WITH IIT CONTACTS WIRED 3516A07 TO TWO SEPARATE TERMINALS Sub 60 775B349 Figure 20. Style Descriptions of CO Relay with ICS Unit. Courtesy of NationalSwitchgear.com...
- Page 31 SINGLE TRIP 183A680 CO-8 1-12 6-144 SINGLE TRIP 3524A37 CO-9 .5-2.5 SINGLE TRIP 183A680 CO-11 .5-2.5 SINGLE TRIP 183A680 CO-11 .5-2.5 2-48 SINGLE TRIP 3515A06 Sub 60 775B349 Figure 21. Style Description of CO Relays with ACS Units Courtesy of NationalSwitchgear.com...
- Page 32 I.L 40-100J * Sub 20 57D7900 Figure 22. Outline and Drilling Plan for the Type CO Relay *Denotes Change Since Previous Issue Courtesy of NationalSwitchgear.com...