1. BS EN 61557+AC0-11:2009. Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. +AC0- Equipment for testing, measuring or monitoring of protective measures +AC0-Part 11

2. BS EN 61557+AC0-12:2008. Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. +AC0- Equipment for testing, measuring or monitoring of protective measures +AC0-Part 12

3. BS EN 61557+AC0-13:2011. Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. +AC0- Equipment for testing, measuring or monitoring of protective measures +IBQ- Part 13

4. BS EN 61557+AC0-14:2013. Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. +AC0- Equipment for testing, measuring or monitoring of protective measures +IBQ- Part 14

5. BS EN 61557+AC0-15:2014. Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. +AC0- Equipment for testing, measuring or monitoring of protective measures +IBQ- Part 15

6. BS EN 61557+AC0-16:2015. Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. +AC0- Equipment for testing, measuring or monitoring of protective measures +AC0- Part 16

7. BS EN 61558+AC0-1:2005 +- A1:2009. Safety of power transformers, power supplies, reactors and similar products +AC0- Part 1 General requirements and tests

8. BS EN 61558+AC0-2+AC0-1:1998 IEC 61558+AC0-2+AC0-1:1997. Safety of power transformers, power supply units and similar +AC0- Part 2.1 Particular requirements for separating transformers for general use

9. BS EN 61558+AC0-2+AC0-10:2014. Safety of transformers, reactors, power supply units and combinations thereof +AC0- Part 2+AC0-10

10. BS EN 61558+AC0-2+AC0-12:2001. Safety of power transformers, power supply units and similar devices +AC0- Part 2+AC0-12: Particular requirements for constant voltage transformers