Already a subscriber?
MADCAD.com Free Trial
Sign up for a 3 day free trial to explore the MADCAD.com interface, PLUS access the
2009 International Building Code to see how it all works.
If you like to setup a quick demo, let us know at support@madcad.com
or +1 800.798.9296 and we will be happy to schedule a webinar for you.
Security check
Please login to your personal account to use this feature.
Please login to your authorized staff account to use this feature.
Are you sure you want to empty the cart?
17/30352666 DC BS EN 61869-220. Instrument transformers. Part 220. Safety requirements for Instrument Transformers for low voltage applications, 2017
- 38_538e_CD.pdf [Go to Page]
- INTRODUCTION
- 1 Scope and object
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1 Equipment and states of equipment
- 3.4 Parts and accessories
- 3.5 Quantities
- 3.6 Tests
- 3.7 Safety terms
- 3.9 Insulation
- 4 Tests
- 5 Marking and documentation [Go to Page]
- 5.1 Marking [Go to Page]
- 5.1.1 General
- 5.1.2 Identification
- 5.1.3 Mains supply
- 5.1.4 Fuses
- 5.1.5 Terminals, connections and operating devices other than measuring circuit terminals
- 5.1.6 Switches and circuit-breakers
- 5.1.7 Equipment protected by double insulation or reinforced insulation
- 5.1.8 Field-wiring terminal boxes
- 5.1.9 Measuring circuit terminals [Go to Page]
- 5.1.9.1 General
- 5.1.9.2 Measuring circuit terminals rated for measurement categories II,III or IV
- 5.1.9.3 Measuring circuit terminals rated for connection to voltages above the levels of clause 6.3.1
- 5.1.9.4 Permanently connected, dedicated, or low voltage measuring circuit terminals
- 5.2 Warning markings
- 5.3 Durability of markings
- 5.4 Documentation [Go to Page]
- 5.4.1 General
- 5.4.2 Equipment ratings
- 5.4.3 Equipment installation
- 5.4.4 Equipment operation
- 5.4.5 Equipment maintenance and service
- 5.4.6 Integration into systems or effects resulting from special conditions
- 6 Protection against electric shock [Go to Page]
- 6.1 General [Go to Page]
- 6.1.1 Requirements
- 6.1.2 Exceptions
- 6.2 Determination of accessible parts
- 6.3 Limit values for accessible parts
- 6.4 Primary means of protection
- 6.5 Additional means of protection in case of single fault conditions [Go to Page]
- 6.5.1 General
- 6.5.2 Protective bonding [Go to Page]
- 6.5.2.1 General
- 6.5.2.2 Integrity of protective bonding
- 6.5.2.3 Protective conductor terminal
- 6.5.2.4 Impedance of protective bonding of plug-connected equipment
- 6.5.2.5 Impedance of protective bonding of permanently connected equipment
- 6.5.2.6 Transformer protective bonding screen
- 6.5.3 Supplementary insulation and reinforced insulation
- 6.5.4 Protective impedance
- 6.5.5 Automatic disconnection of the supply
- 6.5.6 Current- or voltage-limiting device
- 6.6 Connections to external circuits [Go to Page]
- 6.6.1 General
- 6.6.2 Terminals for external circuits
- 6.6.3 Circuits with terminals which are hazardous live
- 6.6.4 terminals for stranded conductors
- 6.7 Insulation requirements [Go to Page]
- 6.7.1 The nature of insulation [Go to Page]
- 6.7.1.1 General
- 6.7.1.2 Clearances
- 6.7.1.3 Creepage distances
- 6.7.1.4 Solid insulation
- 6.7.1.5 Requirements for insulation according to type of circuit
- 6.7.2 Insulation for mains circuits of overvoltage category II with a nominal supply voltage up to 300 V
- 6.7.3 Insulation for secondary circuits derived from mains circuits of overvoltage category II up to 300 V
- 6.8 Procedure for voltage tests
- 6.9 Constructional requirements for protection against electric shock
- 6.10 Connection to the mains supply source and connections between parts of equipment
- 6.11 Disconnection from supply source
- 7 Protection against mechanical hazards
- 8 Resistance to mechanical stresses
- 9 Protection against the spread of fire
- 10 Equipment temperature limits and resistance to heat [Go to Page]
- 10.1 Surface temperature limits for protection against burns
- 10.2 Temperatures of windings
- 10.3 Other temperature measurements
- 10.4 Conduct of temperature tests [Go to Page]
- 10.4.1 General
- 10.4.2 Temperature measurement of heating equipment
- 10.4.3 Equipment intended for installation in a cabinet or a wall
- 10.5 Resistance to heat
- 11 Protection against hazards from fluids [Go to Page]
- 11.1 General
- 11.2 Cleaning
- 11.3 Spillage
- 11.4 Overflow
- 11.5 Battery electrolyte
- 11.6 Equipment rated with a degree of ingress protection (IP) [Go to Page]
- 11.6.1 General
- 11.6.2 Conditions for testing [Go to Page]
- 11.6.2.1 Protection against solid foreign objects (including dust)
- 11.6.2.2 Protection against water
- 11.7 Fluid pressure and leakage
- 11.8 Corrosion
- 12 Protection against radiation, including laser sources, and against sonic and ultrasonic pressure
- 13 Protection against liberated gases and substances, explosion and implosion
- 14 Components and subassemblies [Go to Page]
- 14.1 General
- 14.2 Motors
- 14.3 Overtemperature protection devices
- 14.4 Fuse holders
- 14.5 Mains voltage selection devices
- 14.6 Mains transformers tested outside equipment
- 14.7 Printed wiring boards
- 14.8 Circuits or components used as transient overvoltage limiting devices
- 15 Protection by interlocks
- 16 Hazards resulting from application
- 17 Risk assessment
- 18 Secondary circuits
- Annex A (normative) Measuring circuits for touch current (see 6.3)
- Annex B (normative) Standard test fingers (see 6.2)
- Annex C (normative) Measurement of clearances and creepage distances
- Annex D (normative) Parts between which insulation requirements are specified (see 6.4 and 6.5.3)
- Annex E (informative) Guideline for reduction of pollution degrees
- Annex F (normative) Routine tests
- Annex G (informative) Leakage and rupture from fluids under pressure
- Annex H (normative) Qualification of conformal coatings for protection against pollution
- Annex I (informative) Line-to-neutral voltages for common mains supply systems
- Annex J (informative) Risk assessment
- Annex K (normative) Insulation requirements not covered by 6.7 [Go to Page]
- K.1 Requirements for mains circuits
- K.2 Insulation in secondary circuits
- K.3 Insulation in circuits not addressed in 6.7, Clause K.1, Clause K.2, clause K.5, and for measuring circuits where measurement categories do not apply
- K.4 Reduction of transient overvoltages by the use of overvoltage limiting devices
- K.5 Insulation requirements for measuring circuits of measurement categories II, III and IV [Go to Page]
- K.5.1 General
- K.5.2 Clearances
- K.5.3 Clearances
- K.5.4 Solid insulation [Go to Page]
- K.5.4.1 General
- K.5.4.2 Moulded and potted parts
- K.5.4.3 Insulating layers of printed wiring boards
- K.5.4.4 Thin-film insulation
- Annex L (informative) Index of defined terms
- Annex M (normative) Measurement categories [Go to Page]
- M.1 General
- M.2 Measurement categories [Go to Page]
- M.2.1 Measurement category II
- M.2.2 Measurement category III
- B.2.3 Measurement category IV
- B.2.4 Measuring circuits without a measurement category rating
- Bibliography [Go to Page]