Bistable Relay. Types PSU6n, PSU14n. Station Automation & Protection. ABB Substation Automation Products
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1 Station Automation & Protection Bistable Relay Types PSUn, PSUn. ABB Substation Automation Products
2 Features High degree of reliability, even when it has been idle for a long time PSUn.. with mechanical flag type indicator / contacts with double interruption Contact configuration can be changed with ease Different mounting variants Wide range of voltage and contact configuration Application For remote and automatic control there is often a need for contactors which have two stable contact positions, even in the dead state. This requirement is fulfilled by changeover contactors type PSU..n.. The application of alternate control pulses to the coils cause the contacts to change from the one state to the other. If the supply is interrupted, the contacts remain in their previous position, even when the voltage is restored. Design and principle Basically, the PSU changeover contactors are composed of the same constructional elements as the established contactors type Pn. Two magnet systems are inter- connected by a pivoted element. In the type PSUn... with free contacts, only one system has contacts; in type PSUn... with free contacts, both systems have contacts. In each case two contacts are required for changing over the connection of the coils. The contacts are arranged symmetrically on both sides of the relay coil and armature assembly in two stacks. They are easily accessible and the conversion from N/C to N/O contacts and vice versa is simple. The maximum rated voltage is V d.c. or a.c. and the material used is hard silver. The following definitions apply for reset and operate condition; reset condition - Armature assembly position is away from the base i.e. the upper system has been pulsed and lower system is ready to be pulsed. The flag strips are invisible i.e. white during this condition. Operate condition - Armature assembly position is closer to the base i.e. the lower system has been pulsed and upper system is ready to be pulsed. The flag strips are visible i.e. red during this condition. A transparent, incombustible cover with a gasket protects the contacts against dirt. The terminals of the contact stacks themselves permit two wires of 1.mm diameter maximum to be secured. The terminals on the base for the external wiring have holes with a diameter of 3.mm. The terminals on the plug-in base can accommodate two wires, each 2 with a cross-section of 2.mm. Changeover relays must always be mounted with the contact post horizontal, that is with the base on a vertical surface. The plug-in version offers many advantages, both from the point of view of installation and afterwards for maintenance. It is fitted with locating pegs which prevent it from being inserted the wrong way round. The labelling of the terminals on the base is identical to that on the contact stacks. Type designation of auxiliary relays: PSU Basic relay n with free contacts and without indicator n with or free contacts and with indicator 2Y mounted on sheet-metal base with 2 sets of terminal blocks 4Y X 2X mounted on sheet-metal base with 4 sets of terminal blocks mounted on one set of plug-in base mounted on two sets of plug-in base Example: PSUnX denotes a PSU type relay with free contacts, mounted on one set of plug-in base. Available types: PSUn2Y, PSUn4Y, PSUn2X, PSUnX, PSUnX ( contacts).
3 Technical data Energizing quantities, rated values and limits Rated voltage U N : 24,, 4, 1,, 2, V DC Operative voltage range : +%, -% of U N Permitted ambient temperature range : 0 Deg C to + Deg C Pick-up voltage (%U N) : < 0% Pick-up time at U N (typical) : -40 m sec Maximum power consumption at the instant of : W switching Mechanical durability tested acc to IEC 2 : 1 x switching operations, 0 Draw-out / Plug-in operations Weight Type PSUn2Y : 1. Kg. Type PSUnX : 1.3 Kg. Type PSUnX : 2.1 Kg. Type PSUn2X : 2. Kg. Type PSUn4Y : 2.4 Kg. Contact data Contact configuration Type PSUn : N/O+N/C, N/O+N/C, N/O+N/C, N/O+4N/C, N/O+3N/C, N/O+2N/C, N/O+ 1N/C or NO Type PSUn : 3N/O+3N/C, 4N/O+2N/C, N/O+ 1N/C or NO Type PSUnX : 4N/O+3N/C, N/O+2N/C, N/O+1N/C, or N/O Rated voltage : V dc/ac Rated current : A Max. making current : 0 A, 0. sec, Max. Breaking capacities Voltage 24V 4V 1V V Contacts 1 2 in 1 2 in 1 2 in 1 2 in 2 in Parallel parallel parallel parallel series DC resistive load A A A A A A 1A - A DC inductive. L/R =1ms A A A A 4 A - 1 A - 4 A DC inductive, L/R =40ms 4 A A 4 A A 3 A - 0.A - 2 A AC resistive & inductive A - A - A - A - - Electrical endurance; : 0,2 Million operations, Tested according to IEC 2-23 at 1 V dc, 0,A L/R 40 ms. Terminals : Suitable for 2x2,mm2 wires Electrical tests Measurement of resistance; Tested acc. to IEC 2- : +/- % of specified Temperature-rise; Tested acc. to IEC 2- : Coil (class F) Insulation resistance; Tested acc. to IEC 2- : >0 M Ohm at 00 V dc Dielectric; Tested acc. to IEC 2- : 2,0 kv 0 Hz, 1 min Impulse; Tested acc. to IEC 2- : kv, 1,2/0us, 0,J Environmental tests Vibration response; Tested acc. to IEC 2--1 Vibration endurance; Tested acc. to IEC 2--1 Dry heat; Tested acc. to IEC -2-2 Dry cold; Tested acc. to IEC -2-1 Damp heat (cyclic - days); Tested acc. to IEC -2- Storage test; Tested acc. To IEC -2-4 : -Hz; 0.g; 3 axis : -Hz; 1.0g; 3axis : at + Deg C in energized condition : at 0 Deg C : Hr/ C + Hr/2 C x 3% RH : +0 Deg C for 2 Hrs and -2 Deg C for 2 Hrs Ordering details: Relay type Auxiliary voltage Contact configuration
4 Connection diagram and contact configuration NO + NC NO + NC NO + NC NO + 4NC NO + 3NC NO + 2NC NO + 1NC NO Fig.1- Relay type PSUn on sheet-metal base mounting or on plug-in base mounting. The contact positions are shown for relay in reset condition.
5 NO + 3NC NO + 2NC NO + 1NC NO Fig.2- Relay type PSUn on plug-in base mounting. The contact positions are shown for relay in reset condition NO + 3NC 4NO + 2NC NO + 1NC NO Fig.3- Relay type PSUn on sheet-metal base mounting or on plug in base mounting. The contact positions are shown for relay in reset condition.
6 Dimensions Ø Db (+) 1(+) a(-) 3(+) 1(+) a(-) 1 Ls Eo Base for PSUnX Fig.4- Relay on one set of Plug-in base mounting Base for PSUnX 1 3* Db Ob Ls c 1 3 a c 1 3 a PSUn4Y PSUn2Y ø * Fig.- Relay on sheet-metal base mounting Ø Db 3* Eo (+) 1(+) Ls a(-) 1 Eo Db Base for PSUn2X Fig.- Relay on two sets of Plug-in base mounting Legend : Terminals Db : Mounting hole E01 : Cut-out for rear wiring. * : Space for removing hood. Ls : Operation signal Ob : Fixing screw : Base fixing screw
7 Ordering Details Refer type designation for selection and mark ( ) appropriate boxes Type : PSUn2Y Qty... Item no... PSUnX Qty... Item no... Aux Voltage : 24VDC Contacts N/O + 0N/C VDC N/O + 1N/C 4VDC 4N/O + 2N/C 1VDC 3N/O + 3N/C VDC 2VDC VDC Type : PSUnX Qty... Item no... Aux Voltage : 24VDC Contacts N/O + 0N/C VDC N/O + 1N/C 4VDC N/O + 2N/C 1VDC 4N/O + 3N/C VDC 2VDC VDC Type PSUn4Y Qty... Item no... PSUn2X Qty... Item no... Aux Voltage : 24VDC Contacts N/O + 0N/C VDC N/O + 1N/C 4VDC N/O + 2N/C 1VDC N/O + 3N/C VDC N/O + 4N/C 2VDC N/O + N/C VDC N/O + N/C N/O + N/C
8 Network Management Business Management Meter & Load Management Consulting & Services Station Automation & Protection Communications Panorama is the standard for a comprehensive range of integrated solutions for efficient and reliable management of power networks. Using innovative information technology, Panorama delivers total control of the power process, from generation to consumption. The Panorama standard covers six application areas, each offering specific solutions. 1MDB04 -YN - 02 Asea Brown Boveri Limited Substation Automation Products Maneja, Vadodara 0, India. Tel. : 02-43, 434, 43 Fax : aicds@in.abb.com
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