TEST BLOCK SYSTEM - Flyer
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TEST SYSTEM PP-SP TEST BLOCK SYSTEM THE FULL SOLUTION FOR PROTECTION RELAY TESTING AND MAINTENANCE — Application Test links are an important accessory for protection, metering & control panels. They enable test technicians to quickly & safely isolate protection relays so that test signals may be injected & system performance veried. There are a number of advantages in performing injection tests at the protection relay panel: • Reduction in down time of the equipment under test. • Testing does not cause disturbance to wiring, terminals or equipment settings. • Existing auxiliary supply to the equipment under test may be isolated. The PP Test Link Panel has been designed as a general-purpose isolation & test signal injection point. Standard 4mm diameter sockets are employed so that common banana plugs may be used to short CT inputs & connect test equipment. Equipment under test need only be removed for servicing if problems are detected. Features ♦ Colour coded ‘nger safe’ test sockets suit standard or shrouded type 4mm banana plugs ♦ 14 independent circuits suitable for CT or VT connections ♦ Test plug available with automatic CT shorting option ♦ Test plug tted with insertion handles & locking screws ♦ Side label instructions on changing from normal service condition to the test condition ♦ Optional automatic auxiliary isolation function ♦ High current / voltage rating ♦ Compact & economic design Figure 1: Test Plug Test Block System - Flyer- 03 - 2012

— Description — CT SHORTING – AUTOMATIC (Internal) The Test Block type PP comprises fourteen (14) test circuits, each of which is connected to a separate pair of terminals at the rear of the case. During the normal operation of the associated protection equipment, each pair of terminals are connected together by a circuit-shorting link. Changing the PP Test Block from the normal service condition to the test condition is described below & depicted in gure 3: Test Circuit Access Access to the circuits, for testing purposes, is gained by rst removing the front cover. For the PP-B model the...

OPERATION Changing the PP Test Block system from the normal service condition to the secondary injection test condition is achieved in three steps shown in gure 3 below: PP-B Test Block Terminal Status NORMAL SERVICE CONDITION Other EVEN terminals Other ODD terminals 13 22 23 24 25 26 27 TOP VIEW Shown with isolation plug fitted to short terminals 13 & 14 (PP-B model only) 14 21 28 LIVE SIDE EQUIPMENT SIDE REAR VIEW Step 1 - AUXILIARY SUPPLY ISOLATION 13 14 21 22 23 24 25 26 27 Auxiliary supply isolated - PP-B 28 WITHDRAW AUXILIARY ISOLATION PLUG (PP-B model only) DC auxiliary supply link...

TEST LEADS — SHROUDED TEST LEADS Two types of shrouded ‘nger safe’ test leads are available: Description Quantity supplied per SP Two ended test lead - 75mm 3 Two ended test lead - 180mm 3 Wire type: 2.5 mm2 multi-strand wire with yellow PVC insulation — TEST LEAD PLUGS Two types of shrouded plug are employed on each test lead as depicted in gure 4 & 5. Single Plug The single plug is the most compact & may be plugged into any test socket. Dual Plug The dual or ‘piggy back’ plug is larger & should be plugged into the test sockets on the outside edge of the SP. The lead emerging from the dual...

TECHNICAL DATA — PP-A TEST BLOCK (Isolating Plug not fitted) 14 Equipment side terminals (Even terminal numbers). 14 Live side terminals (Odd terminal numbers). 14 Live side to equipment side shorting links. This arrangement provides for up to 14 independent circuits to be connected. An isolating circuit is not provided on this model. — PP-B TEST BLOCK (Includes Isolating Plug) 14 Equipment side terminals (Even terminal numbers). 14 Live side terminals (Odd terminal numbers). 13 Live side to equipment side shorting links. 1 Isolating circuit between terminals 13 & 14 This arrangement...

DIMENSIONS 217 PP Test Block & draw out Isolating Plug Size 2M case suits flush panel mounting & 4U high 19 inch rack frame 2 holes of 3.7 Front view 6 Side view Test Block System - Flyer- 03 - 2012 Terminal layout Panel cut out

ORDERING CODE INFORMATION Generate the required ordering code as follows: e.g. PP-BA PP — 1 1 A Generate the required ordering code as follows: e.g. SP-BA TEST BLOCK (SOCKET) SP — 1 AUXILIARY SUPPLY ISOLATING LINK A Not required (Isolation Plug not supplied) B Required (Test Block supplied with Isolation Plug) — A 1 A TEST PLUG CT SHORTING LINKS A Manual (External links to be tted by operator) B Automatic (Internal links tted between terminals21, 23, 25 & 27) — A FIXED DIGIT FIXED DIGIT TYPICAL APPLICATION OF PP TEST BLOCK & SP TEST PLUG Apply secondary injection test signals BLACK...

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