Safe in use

• Comprehensive and logical list of mechanical and electrical interlocks
• Compartments protected against penetration by objects
• Internal arc rating up to 50 kA for 0.5 seconds and 40 kA for 1 second
• Internal arc classification of AFLR
• Loss of service continuity rating of 2B
• Accessibility of compartments
• Closed door racking
   

Reliable in operation

• Vacuum and cast-resin encapsulation technologies
• CESI certified to latest IEC 62271 -100 and -200 standards
• Totally enclosed and insulated main busbar
• 20,000 operations on vacuum breakers
• Partition classification of PM
   

Efficient over the product life

• 30 year expected product life
• Cable access front and rear; cable entry bottom and top
• Up to 4000 A main busbar and breaker ratings
• Up to 50 kA short circuit and withstand ratings (3 seconds)
• SF6 free
• Low end of life disposable costs with all materials being re-usable or recycled
• Compact and flexible designs (three widths and two depths of panels)
• Environmentally friendly throughout the life cycle
   

Power Xpert UX complies with the following international standards
IEC 62271-1	Common specifications
IEC 62271-100	Circuit breakers (E2, M2, C2)
IEC 62271-102	Disconnectors and earthing switches (E2, M0)
IEC 62271-200	Metal enclosed switchgear and controlgear
IEC 60044-1	Current transformers
IEC 60044-2	Voltage transformers
IEC 60529	Degrees of protection (IP Code)
IEC 61850	Communication networks and systems in substations
IEC 61243-5	Live working - voltage detectors - Part 5: voltage detecting systems

System		12 kV	17.5 kV	24 kV
Rated voltage	kV	12	17.5	24
Lightning impulse withstand voltage	kV	75	95	125
Power frequency withstand voltage	kV	28	38	50
Rated frequency	Hz	50/60	50/60	50/60
Internal arc class			AFLR
Loss of service continuity category			LSC2B
Partition class			PM
Earthing circuit	kA - s	25 - 3; 26.3 - 3; 31.5 - 3; 40 - 3; 50 - 1		20 - 3; 25 - 3
Accessibility of compartments
Circuit breaker compartment			Interlock-controlled
Busbar compartment			Tool-based/non-accessible
Cable compartment			Tool-based or Interlock-controlled
External degree of protection			IP4X (IP41 as an option)
Internal degree of protection			IP2X (IP3X as an option)
Installation			Indoor
Temperature classification	°C		-5 to +40
Relative humidity (max)	%		95
Busbar system
Rated normal current	A	1250, 1600, 2000, 2500, 3150, 4000 (FC*)		1250, 2000, 2500
Rated short-time withstand current	kA - 3 s	25 / 26.3 / 31.5 / 40 / 50		20 / 25
Rated peak withstand current	kA/50 Hz	63 / 66 / 80 / 100 / 125		63 / 80
	kA/60 Hz	65 /  / 82 / 104 / 130		65 / 82
*) FC = Fan cooled.
Circuit breaker ratings
Rated normal current	A	630, 1250, 2000, 2500, 3150, 4000		800, 1250, 2000, 2500
Rated short-circuit breaking current	kA	26.3 / 31.5 / 40 / 50		20 / 25
Rated short-circuit making current	kA	65 / 82 / 104 / 130		65 / 82
Rated short-time withstand current	kA - 3 s	26.3 / 31.5 / 40 / 50		20 / 25
Single capacitor bank switching	C2 A	400
Multiple capacitor bank switching back to back	C1 A	400
Class			S1, E2, C1, C2
Operating cycles at short-circuit current			100
Auxiliary voltage	V		110/120/127 Vac 50/60Hz, 208/220/240 Vac 50/60Hz, 24/48/60 Vdc, 110/125 Vdc, 220/250 Vdc
Mechanism
Rated operating sequence	A		O - 0.3s - CO - 15s - CO O - 0.3s - CO - 180s - CO

  

Panel width	600 mm	800 mm	1000 mm
12 kV and 17.5 kV
Max. rating	630 A / 1250 A	2000 A	3150 A / 4000 A (FC)
Depth	1320	1320 / 1500*	1500
Height (A)	2200	2200	2200
Height including arc chamber (B)	2750	2750	2750
Weight (in kg)	860 / 880	1230	1650
24 kV
Max. rating		800 A / 1250 A	2000 A / 2500 A
Depth		1570	1570
Height (A)		2320	2320
Height including arc chamber (B)		2870	2870
Weight (in kg)		1460 / 1480	1820

 
*) 1500 mm for IAC classification ratings of 40 kA - 1 s and 50 kA - 0.5 s only.