Maintenance Bypass Switch (MBS) operation & Installation Manual
Contents
1. gt 00 00 00 Rev 10265228 A Lc FIN Size A2 Page 1 1 ed 27 9 2006 lt T gt xX lt 1 oN lt O WN gt lt lt gt gt lt Part number 1022958 L1 L2 L3 N PE EAREN l l l I baama L1 L2 L3 N PE POWERWARE Checked Approv 230 400 V 50 or 60 Hz Title 230 400 V 50 or 60 Hz BYPASS INPUT O e lt N N X4 BYPASS X5 MBS MBS TERMINALS SA TIHA N NOS A ee 093 42 TEN SIAL 093 422. the 51 3 switches 4 Turn ON the S1 switch to bypass UPS 5 Turn OFF the 53 switch to disconnect UPS output 6 Use the UPS LCD commands to turn the UPS OFF refer UPS User Manual 7 Turn F1 battery breakers and F2 input breaker in UPS to OFF position 8 Turn OFF the S2 switch to disconnect UPS bypass input 9 Remount the locking plate of the S1 3 switches to the position to prevent the use of them 10 UPS 15 now in the mechanical bypass mode see below Bypass Mains Figure 3 Bypass Mode switch positions 9X55 Basic MBS Operation Installation Manual doc Page 2 of 6 Turn UPS mechanical bypass to normal mode The procedure to turn the UPS back to normal mode 15 described below Bypass UPS output Service bypass Static Bypass Input Figure 4 The service bypass supplying the load positions of the three MBS switches No break transfer from Mechanical Bypass to normal mode 1 The normal start position should be as shown _ OFF OFF 2 Remove the locking plate of the S1 3 switches 3 Turn ON 52 switch to connect bypass input to UPS 4 Turn the F1 battery and F2 input breakers in UPS to ON position 5 Use the UPS LCD commands to Turn UPS on and wait until it is fully started Make sure the UPS 15 not displaying any alarms You may verify the output voltage from the meters screen of the LCD 6 Use the UPS LCD commands to transfer the UPS to
3. E T N Powerware Maintenance Bypass Switch MBS Operation amp Installation Manual Basic Maintenance Bypass Switches for Powerware 9155 amp 9355 up to 15 Part Numbers For 9155 8 15kVA 9155MBS15kVA For 9355 8 15 9355MBS15kVA The maintenance bypass switch may be supplied as an integrated MBS mounted on the back of the UPS or may be supplied as a separate MBS for wall mounting near the UPS The operation of the MBS is allowed for a trained person only who is familiar with the UPS behaviour and functions The full UPS wiring diagram with a MBS switch is presented in the installation part of the manual Note The MBS consists of three switches and failure to understand the correct sequence may drop the critical load Figure 1 The normal positions of the three MBS switches Turn UPS from normal mode to mechanical bypass The procedure to turn the UPS to mechanical bypass switch is described below Service bypass UPS output Static Bypass Input Figure 2 The normal UPS supplying the load positions of the three MBS switches 9X55 Basic MBS Operation Installation Manual doc Page 1 of 6 No break transfer from normal mode to Service Bypass 1 The normal start position is as shown 2 Use the UPS LCD commands to transfer the UPS to internal static bypass mode refer UPS User Manual Remember to verify the transfer before proceeding to the next step Remove the locking plate of
4. internal static bypass Remember to verify the transfer before proceeding to the next step 7 Turn 53 switch to connect UPS output to load 9X55 Basic MBS Operation Installation Manual doc Page 3 of 6 8 Turn OFF 51 switch to disconnect bypass output 9 Use the UPS LCD commands to transfer the UPS to normal mode 10 Remount the locking plate of the S1 3 switches to the position to prevent the operation of the switches 11 UPS is now in Normal mode see below MES Bypass Load Mains 1 Figure 5 Normal Mode switch positions 9X55 Basic MBS Operation Installation Manual doc Page 4 of 6 2 9207 cl GI 01 9002672 6GSec0 4704 8 GGI6 403 SAW 10 494 5 ZH 09 09 A 00 0fZ aping s s WO 9014 SADY 516 ZH 09 09 A 0 JAVMAJAUd S IVNINGAL SEA Aid Aid Aid Ada azaz lt 0 T gt 32 game a 525 REER EE d gt 4 2 Mm 8 lt _ 4 m lt 5 3 3 Aid Aid 093 Aid Aid AJA 12 11 10 MBS x4 BYPASS INPUT
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