25 kV PTO

1x incoming section:

• 1x 25kV incoming compartment
  • 3 phase Busbar 600A with 2 hole connection
  • Isolator 25KV

• 2x 25kV/120V power transformer:
  • 1500VA
  • Connected between incoming receptacle and the breaker
  • With fuse on the primary and the secondary

• 1x 27kV 600A breaker (main breaker)
  • Insulation class: 27kV rms
  • Frequency: 50/60hZ
  • Rated continuous current at 40 C.: 800A
  • BIL: 150kv kV BIL
  • Power frequency withstand voltage: 36kV
  • Rated short-circuit breaking current: 20kA
  • Rated peak withstand current: 52kA
  • Rated short-time withstand current (4 sec) : 20kA
  • Mechanical life/ Operating cycles @ rated current: 30 000
  • Operating cycles @ rated short-circuit breaking current: 200
  • Closing time: less than 42ms
  • Opening time: less than 27ms
  • Break time: less than 38ms

• Remote control for the breaker
• 2x kirk key interlock set (1x interlock between switch handle and door and 1x interlock between PT 25 KV and the LBS at the secondary of the transformer 20MVA (to be installed by client)
• 3x phase protection CT connect to a ION 7650
  • 1x CT shorting bloc (phase CT)

• Control section including:
  • § Controls are mounted on the interior door
  • § 1x SOLA HD 2000VA power conditioner (for controls)
  • § 1x SEL-751A protection relay with arc flash detection (same as the PTO of your 7.5MVA trailer mounted substation)
  • 1x CT shorting bloc (phase CT)
  • 1x CT shorting bloc (GF CT)
  • § 1x Timer for delayed closing of PTO
  • § 1x LED Indication lights “PTO BREAKER OPEN”
  • § 1x LED Indication lights “PTO BREAKER CLOSED”
  • § 1x sets of pushbuttons for OPEN/CLOSE control of “PTO BREAKER”
  • § 1x LED Indication light for “CONTROL POWER ON”
  • § Switch ethernet 24 port Cisco model 2960X-24PS-L
  • § 1x space heater with thermostat
  • § 1x external protection door (double door, similar to the PTO of your 7.5MVA trailer mounted substation)

• 1x 25kV 600A load break switch (main)
  • ABB NAL 27
  • Insulation class: 27kV
  • Frequency: 50/60hZ
  • Rated continuous current at 40 C.: 600A

• Interlocked with the load break switch (preventing closing/grounding when the system is live)

• 1x kirk key interlock set (interlock between switch handle and door)

• 1x Electrical auxiliary contact on the LBS to open the ground check circuit for the load (open ground check loop of the load when the switch open)

• 1x space heater with thermostat

• 1x pushbutton and internal light (to help see LBS and grounding switch state through the windows)

• 1x external protection door (double door, similar to the PTO of your 7.5MVA trailer mounted substation)

• 1x Emergency stop button (installed on the external door) to open the ground check pilot from feed

• 3x PTO 25kv 250A
  • 1x 25kV 250A load break switch
    • § ABB NAL 27
    • § Insulation class: 27kV
    • § Frequency: 50/60hZ
    • § Rated continuous current at 40 C.: 600A

• Interlocked with the load break switch (preventing closing/grounding when the system is live)

• 1x switch operation handle with padlock provision

• 1x kirk key interlock set (interlock between switch handle and door)

• 1x Electrical auxiliary contact on the LBS to open the ground check circuit for the load (open ground check loop of the load when the switch open)

• 1x 27kV 600A breaker specification
  • Insulation class: 27kV rms
  • Frequency: 50/60hZ
  • Rated continuous current at 40 C.: 800A
  • BIL: 150kv kV BIL
  • Power frequency withstand voltage: 36kV
  • Rated short-circuit breaking current: 20kA
  • Rated peak withstand current: 52kA
  • Rated short-time withstand current (4 sec) : 20kA
  • Mechanical life/ Operating cycles @ rated current: 30 000
  • Operating cycles @ rated short-circuit breaking current: 200
  • Closing time: less than 42ms
  • Opening time: less than 27ms
  • Break time: less than 38ms

• 1x pushbutton and internal light (to help see LBS and grounding switch state through the windows)
• 1x external protection door (double door, similar to the PTO of your 7.5MVA trailer mounted substation)
• 1x Emergency stop button (installed on the external door) to open the ground check pilot from feed
• 1x CT for Startco SE-135
• 3x CT for the SEL751A
• 1x 25kV output receptacle
  • Patton & Cooke
  • Frequency: 50/60hZ
  • Rated continuous current at 40 C.: 250A
  • Mounted outside, accessible from the ground level

• 1x control section per PTO:

• Controls are mounted on the interior door
• 1x Startco SE-135 ground check/ground fault relay (for the PTO output)
• 1x SEL-751A protection relay with arc flash detection
• 1x CT shorting bloc (phase CT)
• 1x CT shorting bloc (GF CT)
• 1x Timer for delayed closing of PTO
• 1x LED Indication lights “PTO BREAKER OPEN”
• 1x LED Indication lights “PTO BREAKER CLOSED”
• 1x sets of pushbuttons for OPEN/CLOSE control of “PTO BREAKER”
• 1x LED Indication light for “CONTROL POWER ON”
• 1x space heater with thermostat
• 1x Ethernet switch Cisco model
• 1x external protection door (double door, similar to the PTO of your 7.5MVA trailer mounted substation)

Auxiliary service

• Transformer 25KVA 13,8KV-120/240V
  • § With primary fuses
  • § secondary with 100A fused disconnect 120/240V connect to a double throw switch 120/240V 100A for the auxiliary distribution alimentation
  • § 2x lightning arrester 15KV

• 120/240V panel distribution
  • § Main 125A
  • § 1x Breaker 20A/2P GFCI
  • § 4x Breaker 15A/1P spare
  • § What is needed for other auxiliary service

External status indicator light

• Mounted outside the enclosure, above the 7.2kV output receptacle
• 100 000 hour
• Vibration resistant
• LED light source
• Glass globe with dome guard
• NEMA 4X, hazardous location
• Operating temperature: -40 C to 66 C
• To indicate the status of the contactor
  • Solid RED = PTO breaker closed
  • Solid GREEN = PTO breaker open

Enclosure

• NEMA 3R
• Exterior doors (with door stopper)
• Fully insulated enclosure
• Approximative dimensions: TBA
• Sand blast surface preparation and epoxy painted
• UV protection coating
• All control wiring is SIS type as per CSA C22.2 – No 31 – Switchgear assembly
• Danger signs, Arc-Flash signs, etc.
• CSA/ESA certified
• CAN CSA M421 compliant (mines and quarries)