Alstom Areva GE Grid Solutions MFAC High Impedance Differential Relay MFAC14S

Description: CnG Surplus is based in Perth, Western Australia.We specialise in tools, industrial and mining equipment. We pride ourselves in delivering items in a timely, safe and well packaged fashion to ensure all our buyers are satisfied.All our listings are in stock ready to go and will be sent from Perth within the stated handling time.Tax receipts are sent electronically for all orders, paper copies are available on request. This listing is for 1 x Alstom Areva GE Grid Solutions MFAC High Impedance Differential Relay MFAC14S1AA0001A The item we have for sale is in the photos and is the item you will receive. If you would like any additional information or photos, please message us and we will get back to you. The part number breakdown is as followsMFAC1 : 1 Element4S : 15TE (Size 3) Case for MFAC14 only1A : 50Hz rated frequencyA : 25-175VAC setting range0001 : Standard 152.4 mm Metrosil (Common Contacts)A The below information has been copied from the GE Grid Solutions website as eBay don't allow links to external websites. MFAC High Impedance Differential Relay MFAC relays provide high speed differential protection for various types of power systems plants including generators, reactors, busbars, motors and the individual windings of power transformers. Application When circulating current protection schemes are subjected to through faults, the sudden and often asymmetrical growth in the system current can cause the line current transformers to reach saturation. In this condition, variation in transformer magnetising characteristics can cause large ratio errors with a consequent circuit imbalance and maloperation of the protective relays. To ensure stability, it is common practice to employ high impedance relays set to operate at a slightly higher voltage than that developed in the worst theoretical case of this condition for a given through fault current. On a balanced earth fault system for example, this is when one current transformer of a group is saturated whilst the others remain unaffected. The saturated transformer presents a low impedance path in parallel with the relay and limits the voltage applied. On internal faults this limitation does not exist and voltages of twice the setting are easily reached. Description The relay measuring element is an attracted armature unit of simple and robust construction, supplied from a bridge rectifier. Settings are determined by a series of resistors, selected on a seven-way plug bridge. Relays with a fine control facility have an additional plug bridge, which is calibrated in intermediate settings. An overall setting is obtained by adding together each plug bridge reading. A capacitor is connected in series with the operating coil to make the relay insensitive to the DC component of fault current. The setting voltage can thus be calculated in terms of RMS alternating quantities, without regard for the degree of offset produced by the point on wave at which the fault occurs. A reactor connected in series with the capacitor forms a resonant circuit tuned to the relay rated frequency. International buyers:Buyers are responsible for any import duties, fees, taxes etc. in the destination country.International orders are sent through DHL or Australia Post International Express with tracking and insurance.Some items that contain batteries may have to have the batteries removed prior to sending to your location. Returns:All return costs are to be paid for by the buyer.Goods must be returned in original condition within 30 days of purchase with any seals in place, in original packaging and not damaged in any way. Partial refunds may be issued if goods are used, tampered with or damaged during return process.

Price: 800 AUD

Location: Welshpool DC, Western Australia

End Time: 2025-01-21T14:19:40.000Z

Shipping Cost: 60.34 AUD