ABB Tmax T8 Installation Manual

Installation and service
instructions
Installation, service and maintenance instructions for low voltage moulded case circuit-breakers
1SDH000682R0002 L3885
Tmax T8
Dwg.
App.
Model
L3692 L3885
Resp. Off. LB-DTAT
Take over Off.
Title
Installation, service and maintenance instructions for low voltage moulded case circuit-breakers
Apparatus
Doc.No.
Tmax T8
1SDH000682R0002
Language
en
Scale
Index
1. Description................................................................ pag. 3
1.1 General characteristics................................................... « 3
1.2 External front view of the circuit-breaker ....................... « 3
1.3.1 IEC Circuit-breaker rating plate data ............................ « 3
1.3.2 UL Circuit-breaker rating plate data ............................. « 3
2. Checking on receipt ....................................................... « 3
3. Storage, lifting and weights ........................................... « 3
4. Installation ....................................................................... « 4
4.1 Installation room .............................................................. « 4
4.2 Installation of the flange on the compartment door ....... « 4
5. Electrical connections ..................................................... « 5
5.1 Connections to the power circuit ................................... « 5
5.1.1 Shapes of the terminals ..................................................« 5
5.1.2 Examples of positioning the connection busbars
according to the types of terminals ............................. « 5
5.1.3 Assembly procedure for the connection busbars ........ « 6
5.2 Wiring the circuit-breaker auxiliary circuits .................... « 6
6. Putting into service ......................................................... « 7
6.1 General procedures ....................................................... « 7
7. Instructions for use ......................................................... « 8
7.1 Operating and signalling parts ...................................... « 8
7.2 Circuit-breaker closing and opening procedures ........ « 8
8. Maintenance ................................................................... « 10
8.1 Warning ..........................................................................« 10
8.2 Maintenance program .................................................... « 10
8.3 Maintenance operations ................................................. « 11
8.3.1 Preliminary operations .................................................... « 11
8.3.2 General inspection of the circuit-breaker ...................... « 11
8.3.3 Operating mechanism maintenance ............................. « 11
9. Measures to be taken for any operating
anomalies ...................................................................... « 12
10. Accessories ..................................................................... « 13
10.1 Electrical accessories .................................................... «13
10.2 Mechanical locks ...........................................................«15
10.3 Spare parts .................................................................... «15
11. Protection releases - References ................................... « 16
11.1 Safety notes .................................................................... « 16
11.1.1 Notes for dielectric stiffness tests ................................... « 16
11.2 General notes.................................................................. « 16
12. Overall dimensions ......................................................... « 17
13. Circuit diagrams ............................................................. « 23
Model
L3692 L3885
Apparatus
Doc. No.
Tmax T8
1SDH000682R0002
Scale
Page No.
1/29
Model
L3692 L3885
Apparatus
Doc.No.
Tmax T8
1SDH000682R0002
Scale
Page No.
2/29
1. Description
1.1 General characteristics
Tmax T8 serie of circuit-breakers and disconnectors consist of a plastic structure which houses the operating mechanism, the poles and the auxiliary parts. Each pole, insulated from the others, contains the circuit-breaking parts and the current sensor of the corresponding phase. The fixed version circuit-breaker has its own terminals for connection to the power circuit.
1.2 External front view of the circuit-breaker
1
2
Fig. 1
1 PR232/P-T8, PR331 o PR332 electronic microprocessor-based release 2 Operating and control parts of the operating mechanism and release tripped signals 3 Rating plate
3
1.3.1 IEC Circuit-breaker rating plate data
Fig. 2
1.3.2 UL Circuit-breaker rating plate data
Fig. 3
2. Checking on receipt
Fixed circuit-breaker
Examine the state of the material received and its consistency with the content of the order. Should any damage or errors be found on unpacking,
which must be carried out carefully, make the relative notification within and not over 5 days from the receipt of the material. The notification must indicate the number of the shipping note.
3. Storage, lifting and weights
The circuit-breaker, protected by an external wooden crate, is fixed by means of screws to the transport pallet or to the bottom of the packing case. If the circuit-breaker has to remain in the warehouse even for a short time before being put into service, after checking it on receipt, it must be put back in its container and covered with a waterproof sheet.
Caution
– Use a dry, dust-free room free of aggressive chemical agents as a storage room – Position the circuit-breaker and any fixed part on a horizontal surface, not in direct contact with the floor, but on a suitable support surface (Fig. 4) – The maximum number of stackable circuit-breakers is indicated in figure 5 – Keep the circuit-breaker in the open position and with the closing springs discharged to avoid unnecessary stresses and the risk of accidents to the personnel.
Fig. 4 Fig. 5
Model
L3692 L3885
Apparatus
Doc. No.
Tmax T8
1SDH000682R0002
Scale
Page No.
3/29
For lifting, refer to the following instructions: the circuit-breakers must be placed on a sturdy supporting surface and lifted, preferably, by means of a special fork-lift truck. However, the use of ropes is allowed. In this case, the lifting ropes must be hooked up as shown in the figures
Fig. 6
Table of the circuit-breaker weights (Kg.)
Circuit-breaker 3 poles 4 poles
Kg Lbs Kg Lbs
T8 1600 (UL) 73 161 95 209
T8 2000 73 161 95 209
T8 2500 73 161 95 209
T8 3000 (UL) 107 236 140 308
T8 3200 (IEC) 107 236 140 308
Notes
The weights indicated in the table are intended for circuit-breakers complete with PR232/P-T8, PR331 or PR332 releases and relative current sensors, excluding the accessories.
4. Installation
4.1 Installation room
Install the circuit-breaker in a dry, dust-free, non-corrosive room, and in such a way that it is not subject to shocks or vibrations. Where this is not possible, install it inside a switchboard with a suitable degree of protection. For the preparation of the installation room, please refer to the “Overall dimensions” paragraph, which gives information on the following points: – minimum installation volumes of the circuit-breakers and derived versions – distances to be respected for circuit-breakers in compartments – overall dimensions of the circuit-breakers – fixing drillings – compartment door drillings. The installation, commissioning and any ordinary and extraordinary maintenance have to be done by skilled personnel, with a detailed knowledge of the apparatus.
To install a circuit-breaker in the switchboard is enough to fix the circuit­breaker to a vertical surface with M8 screws (fig. 7).
4.2 Installation of the flange on the compartment door (Fig. 8)
– Make the compartment door drillings specified in the “Overall dimensions” paragraph. – Attach the flange (1) on the front of the compartment door, fixing it from the inside by means of the self-tapping screws (2).
Fig.7
Fig. 8
Model
2
1
L3692 L3885
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Tmax T8
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5. Electrical connections
5.1 Connections to the power circuit
5.1.1 Shapes of the terminals
FES
Front terminals (IEC/UL)
Fig. 9
Note
The drawings are provided to show the type of terminal in graphic form. The exact shape of the terminals is given in the “Overall dimensions” chapter. Different terminals can be installed between the top and bottom parts (inlet and outlet).
5.1.2 Examples of positioning the connection busbars according to the types of terminals
Front terminals
extended (IEC)
VR/HR VR
Adjustable rear
terminals ( VR for
IEC/UL; HR for
IEC)
Vertical rear terminals (IEC)
VR
Vertical rear terminals (UL)
The connection busbars enable the connection between the terminals of the circuit-breakers and the busbars of the switchgear. Their sizing must be carefully studied by the switchgear designer. Some examples of possible constructions in relation to the shape and size of the circuit­breaker terminals are given in this paragraph. It is normally advisable to exploit the whole contact surface of the terminal, so the width of the connection busbars should be the same as that of the terminal. Different connection capacities can be obtained by adjusting the thickness and number of busbars in parallel. In some cases, reductions in the width of the connection in relation to that of the terminal are allowable as shown in the following examples.
Front terminals Vertical rear terminals
Circuit-breaker Iu [A] Busbar cross-section Busbar cross-section
[mm2]/[in2] [mm2]/[in2]
T8 V 1600 3x(100x5) / 3x(3.94x0.2) 3x(100x5) / 3x(3.94x0.2) T8 L-V 2000 3x(100x5) / 3x(3.94x0.2) 3x(100x5) / 3x(3.94x0.2) T8 L-V 2500 4x(100x5) / 4x(3.94x0.2) 4x(100x5) / 4x(3.94x0.2) T8 V 3000 - 6x(100x5) / 6x(3.94x0.2) T8 L-V 3200 - 6x(100x5) / 6x(3.94x0.2)
Fig. 10
Model
L3692 L3885
Apparatus
Doc. No.
Tmax T8
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Page No.
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Positioning the first anchoring baffle of the busbars
Anchoring to the switchgear
190
7.48"
190
7.48"
190
7.48"
190
7.48"
190
7.48"
190
7.48"
190
7.48"
Fig. 11
5.1.3 Assembly procedure for the connection busbars
Check the state of the contact surfaces of the connections very carefully: they must be very clean with no burrs, dents or traces of rust which must be eliminated using a fine file or an emery cloth to prevent localized increases in temperature. On completion of the operation, remove all traces of grease or dust with a cloth soaked in a suitable solvent.
When aluminium connections are used, it is necessary to tin-plate the contact surfaces.
The connections must not exert any strain on the terminals in any direction. Always insert a large-diameter flat washer and a spring washer between them (to spread the tightening pressure over a greater area). Make the contact between connection and terminal and tighten the fixing screws completely.
Always use two wrenches (so as not to strain the insulating parts excessively), applying the tightening torque
of the main terminals =70 Nm/615 lb in for M12 high strength screws. Check tightness after 24 hours.
5.2 Wiring the circuit-breaker auxiliary circuits
A special terminal box is provided, fitted with screw terminals for connecting the auxiliary circuits. The terminals are marked with alphanumerical identification codes as for the electrical circuit diagram. The terminal box is identified by code XV on the electrical circuit diagram. The terminal box is immediately accessible when the compartment door is open.
XV
Fig. 12
Model
L3692 L3885
Apparatus
Doc.No.
Tmax T8
1SDH000682R0002
Scale
Page No.
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6. Putting into service
6.1 General procedures
– Check tightness of the power connections at the circuit-breaker terminals – Carry out all the preparatory operations on the release – Make sure that the value of the auxiliary circuit power supply voltage is between 85 and 110% of the rated voltage of the electrical applications – Make sure that there is an adequate air circulation in the place of installation to avoid overheating – Also carry out the checks specified in the following table.
Item inspected
1 Manual operating mechanism
2 Geared motor (if provided)
3 Undervoltage release (if provided)
4 Shunt opening release (if provided)
5 Shunt closing release (if provided)
6 Circuit-breaker lock in the open position
(with key or padlocks)
7 Auxiliary contacts of the circuit-breaker
Procedure
Carry out some opening and closing operations (see chapter 7.2). CAUTION When there is an undervoltage release, the circuit-breaker can only be closed after the release has been electrically energized.
Supply the spring loading geared motor at the corresponding rated voltage.
Carry out some closing and opening operations.
Note. Supply the undervoltage release at the corresponding rated voltage (if any).
Supply the undervoltage release at the corresponding rated voltage and carry out the circuit-breaker closing operation. Disconnect voltage to the release.
Supply the undervoltage release at the corresponding rated voltage and carry out
the circuit-breaker closing operation.
Close the circuit-breaker. Supply the shunt opening release at the corresponding rated voltage.
Open the circuit-breaker. Supply the shunt closing release at its rated
voltage.
Open the circuit-breaker, turn the key and remove it from its seat. Attempt circuit-breaker
closing operation.
Insert the auxiliary contacts in suitable signalling circuits. Carry out some circuit-
breaker closing and opening operations.
Positive check
The spring loading lever moves correctly.
The springs are loaded correctly. The signals are correct. The geared motor stops with the springs loaded. The geared motor reloads the springs after each closing operation.
The circuit-breaker closes correctly. The signals are correct.
The circuit-breaker opens. The signal changes
over.
The circuit-breaker opens correctly. The
signals are correct.
The circuit-breaker closes correctly. The signalsare correct.
Both manual and electrical closing are prevented.
The signals are given correctly.
Model
L3692 L3885
Apparatus
Doc. No.
Tmax T8
1SDH000682R0002
Scale
Page No.
7/29
7. Instructions for use
7.1 Operating and signalling parts
1 Pushbutton for the manual opening operation 2 Lever for manual loading of the closing springs 3 Mechanical indicator for circuit-breaker open “O” and closed “I” 4 Mechanical indicator for protection release tripped 5 Pushbutton for the manual closing operation 6 Signalling device for springs loaded - unloaded 7 Operation counter (on request) 8 Key lock on the closing operation (on request)
Fig.13
Note
On request, a transparent cover can be installed on the front of the circuit-breaker to increase the degree of protection to IP54. The cover has a locking key. As an alternative to the transparent cover, a protection can be mounted on the manual closing and opening controls, which only allows operation of the pushbuttons by means of a special tool.
4
8
1
2
3
5
6
7
Fig. 14
7.2 Circuit-breaker closing and opening procedures
The operation of the circuit-breaker can be either manual or electrical.
a) Manual loading of the closing springs
– Make sure that the indicator (3) shows “O” (circuit-breaker open) – Make sure that the indicator (6) is WHITE (springs discharged) – Repeatedly activate the lever (2) until the indicator (6) changes its color to YELLOW
b) Electrical loading of the closing springs
The electrical loading of the circuit-breaker is possible when the following accessories (supplied on request) are present: – geared motor for automatic loading of the closing springs – shunt closing release – shunt opening release. The geared motor automatically reloads the springs after each closing operation until the yellow indicator appears (6, Fig. 15). When the power is cut off during loading, the geared motor stops and automatically starts reloading the springs again when the power returns. It is, in any case, always possible to complete the reloading operation manually.
Model
L3692 L3885
Fig. 15
Apparatus
Doc.No.
2
3 6
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