English dropdown-ico

GE AK-50 manual

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of GE AK-50, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of GE AK-50 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of GE AK-50. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of GE AK-50 should contain:
- informations concerning technical data of GE AK-50
- name of the manufacturer and a year of construction of the GE AK-50 item
- rules of operation, control and maintenance of the GE AK-50 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of GE AK-50 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of GE AK-50, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the GE service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of GE AK-50.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the GE AK-50 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

    INTRODUCTION GE Conversion Kits are designed for upgrading existing GE low-voltage power circuit breakers, rather than replacing the entire breaker. The Con- version Kits include ProTrip™ Trip Units, the latest technological advance in GE trip systems. ProTrip Conversion Kits are designed and tested to conform to ANSI Standard C37.59, allowing th[...]

  • Page 2

    2 TABLE OF CONTENTS SECTION 1. GENERAL INFORMATION ....................................................................................................... 4 SECTION 2. BEFORE INSTALLATION .......................................................................................................... 4 SECTION 3. FRONT FRAME BREAKER CONVERSION Relocating [...]

  • Page 3

    3 LIST OF FIGURES 1. Relocation and remounting of the W and X relays. ................................................................................ 5 2. New X and W relay mounting brackets ................................................................................................... 5 3. Flux shifter assembly. ..............................[...]

  • Page 4

    4 SECTION 1. GENERAL INFORMATION GE Conversion Kit installation is straightforward, but does require careful workmanship and attention to these instructions. Familiarity with the breaker is highly desirable. The general approach is to first remove the existing trip devices from the breaker, then install the ProTrip components. Following this proced[...]

  • Page 5

    5 SECTION 3. FRONT FRAME BREAKER CONVERSION Front frame conversion consists of the following steps: 1. Separation of the front and back breaker frames for AK-50, AKU-50, AKS-50, and AKT-50 break ers. (Frame separation is not necessary for AK-75 and AK-100 breakers.) Refer to the appropri ate installation and maintenance manuals sup plied with the b[...]

  • Page 6

    6 Installing the Flux Shifter Assembly The installation procedure for the flux shifter assembly, illustrated in Figure 3, varies depending on the type of breaker and existing trip device. In some cases, mounting holes must be added, termi- nal blocks relocated, or breaker side rails removed. Breakers with EC or Power Sensor Trip Systems 1. Drill th[...]

  • Page 7

    7 Breakers with a Side Bracket 1. Drill a 34” diameter hole into the flux shifter assembly mounting base to provide the neces- sary clearance for the bracket. The location of the new hole is shown in Figure 6. 2. Remove the side bracket from the frame and drill the holes according to the pattern in Figure 4. A full-size template is provided in[...]

  • Page 8

    8 Breakers with ECS or SST Trip Systems 1. Remove the ECS or SST trip unit. 2. Remove the existing flux shifter device and the trip unit control harness. 3. Install the new flux shifter assembly as described above and shown in Figure 5. Installing the Trip Paddle For breakers equipped with an ECS or SST trip sys- tem, the existing trip paddle is us[...]

  • Page 9

    9 Installing the Trip Unit Mounting Bracket The new ProTrip trip unit mounts to the left side of the front channel. A mounting bracket is shock-- mounted to a plate that is assembled to the front channel. EC or Power Sensor Trip System 1. The h oles for the new mounting plate may have to be added to the front channel. The drill pat tern is shown in[...]

  • Page 10

    10 Figure 13. Trip unit mounting bracket attached to the mounting plate.[...]

  • Page 11

    11 SECTION 4. BACK FRAME CONVERSION The back frame conversion consists of the following operations: 1. Modification of the crossbar assembly for the flux shifter installation. 2. Removal of the existing trip devices. 3. Installation of the phase sensors. 4. Installation of the back frame harness. Crossbar Modification The flux shifter reset linkage[...]

  • Page 12

    12 Removing the Existing Trip Devices AK-50 & AKS-50 Breakers with EC or Power Sensor Trip Systems 1. Remove and discard the two screws at the base of each trip device, as shown in Figure 16. Dis- card the metal mounting brackets. 2. Remove and discard the small Philips-head screw at the top of each trip device. 3. Remove and discard the four 5[...]

  • Page 13

    13 Installing the Phase Sensors AK-50 & AKS-50 Breakers Figure 18 shows the parts provided for assembly of the CT on each pole. 1. Mount the new copper CT post to the back frame with the two 3  8 -16 x 1 1  2 " bolts, flat washers, and lock washers provided, as shown in Figure 19. 2. Fasten the three small insulated wire fasteners to[...]

  • Page 14

    14 AK-75 & AK-100 Breakers 1. The ProTrip phase sensors mount on the upper breaker studs, as shown in Figure 21. The sen- sors held on the stud with locking rings. Leave enough of the stud exposed for the primary fin- gers to engage. Engage the sensor’s antiturn lugs with the notch in the locking ring. Before tightening the locking rings, pos[...]

  • Page 15

    15 SECTION 5. INSTALLING THE TRIP UNIT 1. Remove the large screw from the rear of the trip unit. Place the trip unit in position on the mount- ing plate, with the 50-pin connector aligned with the opening in the plate. Secure with the large screw, as shown in Figure 22. 2. Insert the 50-pin female connector on the wiring harness into the trip unit [...]

  • Page 16

    16 SECTION 6 FOUR-WIRE GROUND FAULT OPTION The ground fault option for four-wire installations requires the installation of an additional current sensor on the neutral bus in the equipment. The sensor is connected to the trip unit through the connector provided in the wiring harness. Installing the Fourth-Wire Disconnect AK-50 & AKS-50 Stationa[...]

  • Page 17

    17 AK-50 & AKS-50 Draw-Out Breakers The fourth-wire disconnect for AK-50 and AKS-50 draw-out breakers mounts to the lower back frame, as shown in Figure 25. • If the terminal board is already present on the breaker, just replace the control harness. Main- tain the following color code: white wire to common, black wire to the tap. • If the d[...]

  • Page 18

    18 Figure 28. AK-75 & AK-100 back frame conversion.[...]

  • Page 19

    19 Installing the Neutral Sensor The neutral sensor is an electrical duplicate of the phase sensor, including the taps. Therefore, when taps (if provided) are changed on the phase sensors, the taps on the neutral sensor must be similarly changed. For kits with fixed phase sensors, be sure to use the corresponding tap on the neutral sensor. Mount th[...]

  • Page 20

    20 Figure 30. Outline of the neutral sensor for AK-75 and AK-100 breakers[...]

  • Page 21

    21 SECTION 7. EQUIPMENT CONVERSION Installing Mounting Brackets The equipment compartment contains the mating portions of the fourth-wire disconnect and the neu- tral sensor. The same disconnect assembly is used for types AKD, AKD-5, and AKD-6 switchgear. Mounting brackets for AKD, AKD-5, AKD-6, and AKD -8 switchgear applications are included in th[...]

  • Page 22

    22 Figure 34. AK-50 & AKS-50 fourth-wire disconnect for AKD. Figure 35. Fourth-wire disconnect for AKD-5 & AKD-6.[...]

  • Page 23

    23 SECTION 8. TESTING AND TROUBLE- SHOOTING WARNING : Do not change taps on the current sen- sors or adjust the trip unit settings while the breaker is carrying current. Failure to adhere to these instructions will void all warranties. Testing Before installing a converted breaker back into service, perform the following steps: 1. Verify that the t[...]

  • Page 24

    24 connecting the breaker from all power sources, per- form the follow ing procedure: 1. Check that all phase sensors are the same type (current range). 2. Verify that the tap settings on all three phase sen- sors are identical. 3. Verify that the wiring harness connections to the sensors have the proper polarity (white lead to common, black lead t[...]

  • Page 25

    25 Figure 36. Cabling diagram for ProTrip™ trip units with ground fault on four-wire loads.[...]

  • Page 26

    [...]

  • Page 27

    27 APPENDIX – DRILL TEMPLATES Appendix 1. Drill Template for Flux Shifter Mounting[...]

  • Page 28

    [...]

  • Page 29

    29 Appendix 2. Drill Template for Trip Unit Mounting Appendix 3. Drill Template for Flux Shifter Mounting[...]

  • Page 30

    [...]

  • Page 31

    [...]

  • Page 32

    These instructions do not cover all details or variations in equipment nor do they provide for every possi ble contingency that may be met in connection with installation, operation, or maintenance. Should further information be desired or should particular problems arise that are not covered sufficiently for the purchaser’s purposes, the matter [...]