165A Low Voltage Pole Mounted Circuit Breaker Adapted to Significant Load Imbalances

Product Description

Product Description

This is a new generation of LV Pole Mounted Breaker developed by HAIVO Electric in accordance with the French market 
This product uses air as the insulating medium, and adopts a knife contact and grid arc extinguishing structure. 
Moreover, this product utilizes an integrated digital trip unit in conjunction with a load indicator to achieve the operating time compliant with the HN63-S11 standard and the cumulative overload tripping function. 
Users can adjust the integrated digital trip unit as needed, with three power ratings available: 50kVA, 100kVA, and 160kVA. 
The external pointer of the load indicator serves dual purposes: displaying load status and allowing users to rotate it to set the required cumulative trip time. This pointer adjustment feature employs stepless adjustment,.offering greater operational convenience. 
Users can apply padlocks at the ground-level operating handle to prevent unauthorized personnel from operating the equipment, thereby ensuring power supply security. 
D165T - D265T
LV Pole Mounted breaker/digital trip unit
The protection and management of MV/LV transformers in a rural environment requires specific circuit breakers compatible with significant load differences,thus ensuring full exploitation of the installed power, even in unbalanced operation.

Non-contractual document - Manual N2005985D

1-Post circuit breaker with digital trip unit

	circuit breakers
	D165T	D265T
Reference strandard	NH63-S-11	NH63-S-11
Voltage rating Current rating	440V 165A	440V 265A
Cutout power Closing power	4000A 6800A	6400A 11700A
Number of poles Number of outputs	4 1 output	4 2 outputs
Cable sections	25/70mm*2	50/150mm*2
Breakdown voltage • pulse/earth • at 50Hz • between poles	20kV 10kV 4kV	20kV 10kV 4kV
Control system	Manual	Manual
Installation	on post	on post

Description
Circuit breaker unit
These units (4 poles 3 of which are protected) cut off in air with metal partition chambers to break the arc.
When the circuit breaker is open, a contact makes an electrical link between the transformer neutral and the station structural earth.When the circuit breaker is closed, a spark gap limits the rise in potential of the LV neutral, in relati.n to the structural earthing, for a value exceeding 10 kV.
The circuit breaker is installed inside a weatherproof GRP case.
2 - Digital trip unit

	P=50kVA			P=100kVA			Trip time		P=160kVA			Trip time
	U =440v			U =440v					U =440v
	I=72.2A			I=144.3A					I=231A
	Currant in each phase (in A)			Currant in each phase (in A)					Currant in each phase (in A)
	1	2	3	1	2	3	Min	Max	1	2	3	Min	Max
Temperature=+20ºC
Initial load	48	48	48	96	96	96			155	155	155
Triphase balanced overload	85 100 160 950 2000 58 58 58 0	85 100 160 950 2000 58 58 58 0	85 100 160 950 2000 120 160 220 950	170 200 320 1900 4000 116 116 116 0	170 200 320 1900 4000 116 116 116 0	170 200 320 1900 4000 240 320 440 1900	1h35 25mn 30s 0.02s 0.02s 1h50 15mn 30s 0.02s	1h10 6mn 0.2s 0.05s 50mn 7mn 0.2s	280 320 500 3000 5640 6400 185 185 185 0	280 320 500 3000 5640 6400 185 185 185 0	280 320 500 3000 5640 6400 400 500 700 3000	55mn 26mn 30s 0.02s 0.015s 0.015s 32mn 11mn 30s 0.02s	1h10 7mn 30s 0.1s 0.025s 0.02s 33mn 4mn 0.1s
Temperature=-25ºC
Initial load	76	76	76	152	152	152			240	240	240
Triphase balanced overload	110 130 190 87 87 87	110 130 190 87 87 87	110 130 190 130 130 130	220 260 380 174 174 174	220 260 380 174 174 174	220 260 380 260 360 480	1h 14mn 30s 2h15 10mn 30s	44mn 5mn 30mn 6mn	350 420 600 280 280 280	350 420 600 280 280 280	350 420 600 420 560 760	1h 14mn 30s 2h15 13mn 40s	45mn 5mn 48mn 5mn40s
Temperature=+50ºC
Initial load	25	25	25	50	50	50			80	80	80
Triphase balanced overload	70 90 160 48 48 48	70 90 160 48 48 48	70 90 160 100 130 200	140 180 320 96 96 96	140 180 320 96 96 96	140 180 320 200 260 400	1h30 20mn 45s 1h 15mn 30s	1h07 5mn 1h 7mn	231 300 500 155 155 155	231 300 500 155 155 155	231 300 500 320 420 650	1h5 17mn 35s 1h 15mn 30s	1h05 5mn 40s 1h 7mn

Trip time as per HN 63-S-11 + corrected values (in bold type) to match the selectivity of the TPC fuses.
Digital Trip Unit
The Digital Trip Unit protects the three ratings of the post-mounted transformer (50 kVA, 100 kVA and 160 kVA) , whether it be a conventional transformer (no internal protection) or a new transformer with protection (TPC).
The transformer protection rating is set by a selector.
The micro-controller assesses the transformer temperature in real time, based on the currents in the three phases and the external ambient temperature. This ambient temperature is computed based on the probe and a mathematical model that is also a function of the three phase currents.
Working Ambient

Temperature: -40°C ~ +70°C
Humidity: 100%
Altitude: ≤2000m
Wind speed :≤40m/s • H

Note: No fire, no explosion hazards, no chemical c.rrosion and recurrent severe vibration.
1.lncoming wiring clamp 
2.lncoming wiring hole
3.Arc chute grid
4.Operation mechanism
5.Digital trip unit
6.Load indicator trip indication
7.Position indicator
8.Operation handle

1.Incoming wiring clamp
Users can connect the transformer1s low-voltage side or other four-phase (3P+N) power sources as the incoming power supply for this circuit breaker. Additionally, its unique design eliminates the need for users to crimp lugs before connection (as shown on figure 2).
Additionally, the wiring clamps below it serve as outgoing and phase sequence must be ensured during connection.
2. Incoming wiring hole
Users can insert cables into the circuit breaker at this location. Similar to point 1, its lower section is designed for outgoing connections.
3. Arc chute grid
This grid is designed to extinguish arcs during circuit breaker operation. Users can replace this component based on the current condition of the grid.
4. Operation mechanism
This area houses the circuit breaker's operating mechanism. Designed as a spring-charged closing mechanism with a trip-free release, it can be operated via a floor-mounted handle.
5. Digital trip unit
Digital Trip Unit, distinct from traditional thermal trip units or fixed-function PCB hardware trip units, features embedded current transformers with phase-toneutral voltage supply. It complies with the trip response time and accumulated overload response time specified in the HN63-S11 standard. The capacity is configurable to 50, 100, or 160 kVA as required.
6. Load indicator trip indication
The orange component will drop down when the accumulated load time is reached (indicated by Component 6 rotating clockwise past the O position) and Component 10 is in the configuration shown. This action will internally trigger the circuit breaker to trip.
7. Position indicator
The green component protrudes minimally at the bottom when in the closed position.When in the open position, a significantly longer section becomes visible.
8. Operation handle
This handle connects to the floor-mounted operating handle. During installation,users must secure the linkage pin with a split pin. Downward movement initiates tripping/spring-charging, while upward movement performs the closing operation.
9.Load trip enable/disable handle
This handle enables or disables the trip function of the load indicator.
Downward position:
Operate the 9# Operation Handle downward to charge the mechanism, then upward to cl.se the circuit breaker. During this motion, the 7# Load lndicator Trip Indication resets. If the circuit breaker detects overload, the 6# Load Indicator activates When its pointer rotates clockwise past the O position, the breaker trips.
Inward position:
The load indicator continues monitoring but disables tripping.

Figure 4 shows the installation diagram. The floormounted operating handle connects to the circuit
breaker via a standard iron pipe. The illustrated utility pole is circular; if a square utility pole is used,
this must be specified in the installation notes.