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Obligations of the Company The company has to take care that: Equipment and switchgears are operated according relevant standards CC 2AC 50Hz 230V~ 1 6 A 3 /N /P EA C5 0 H z4 0 0 V 16A The errection, extension and maintenance of the switchgears and equipment are carried out by • qualified technicians or • under supervision of a qualified technician Device Gerät Weaknesses are immediately eliminated The switchgear or equipment will be sorted out in case of dangererous condition. ESTW/ Castor Limit Distances of the Danger Area Nominal Voltage to 1000 V up to 6 kV indoor up to 6 kV outdoor up to 10 kV indoor up to 10 kV outdoor up to 15 kV up to 20 kV up to 30 kV up to 36 kV up to 45 kV up to 66 kV up to 70 kV up to 110 kV up to 220 kV up to 380 kV (Uimp = 950 kV) up to 380 kV (Uimp = 1050 kV) up to 480 kV up to 700 kV Distances covering 90 mm 120 mm 120 mm 150 mm 160 mm 220 mm 320 mm 380 mm 480 mm 630 mm 750 mm 1100 mm 2100 mm 2900 mm 3400 mm 4100 mm 6400 mm Working in the neighbourhood of a switchgear (ecxceptions § 8 BGV A3) is only allowed, if: • The voltage free state is given and guaranteed for the duration of the work • Active parts are secured for the duration of the work by covering or fences • The minimum distances are kept. Hochspannung LEBENSGEFARHR ! § 7 BGV A3 BGI 548 Coverage for nominal voltages upt to 1 000V Coverage or fences for nominal voltages over 1 kV, with additional air gap ESTW/ Castor Distance Limits • The minimum distances should be Following protection distances are valid for activities of technician or instructed persons or for supervised works Following protection distances are valid for civil works and other non-electrical works at the neighborhood of active parts. Mindestschutzabstand Nennspannung bis 1 000V 0,5 m über 1 kV bis 30 kV über 30 kV bis 110 kV 1,5 m 2,0 m über 110 kV bis 220 kV über 220 kV bis 380 kV 3,0 m 4,0 m Nennspannung Mindestschutzabstand bis 1 000V 1,0 m über 3,0 m 1 kV bis 110 kV über 110 kV bis 220 kV über 220 kV bis 380 kV Tabelle 102: DIN VDE 0105-100 Schutzabstände Schutzabstand 4,0 m 5,0 m Tabelle 103: DIN VDE 0105-100 Annährungszone, Schutzabstände § 7 BGV A3 BGI 548 ESTW/ Castor 5 safety Rules ESTW/ Castor Fünf-Sicherheits-Regeln International ESTW/ Castor Process of a Voltage Check or 1. Check of the voltage testing device 2. Volting testing device at refence voltage Red light 3. Testing of the equipment at all poles Green light 4. Volting testing device at refence voltage Red light ESTW/ Castor Ground and Short Circuit The cable in trenches will be exclusively cut with agrounded hydraulic scissor. No one is allowed to stay in the trench during that work ! Exception Zero voltage is given and the course in the trench can be indentified! Short circuit in a trench Grounding and short circuit is mandatory at the connection of cable and overhead line. ESTW/ Castor Grounding and Short Circuit Additional rules for switchgears with nominal voltages over 1 kV For works on transformers, both sides are to be grounded and short ciruit, even if the nominal voltage on the LV side is under 1 kV. This rule is also valid for three or multiple winding transformers. Beside grounding and short-circuit at the working location, at least one switching location must be earthed and grounded for overhead lines with a nominal voltage from 1 kV up to 30 kV. For higher nominal voltages, all switching locations have to be grounded and short circuit. Grounding and short circuit at one of the next poles is allowed in case of pole breakers. For works on cables, isolated lines, electrical equipment, which is connected over spur cables or isolated lines (i.e. motors) grounding and short-circuit is not mandatory. But all switching locations must be grounded and short-circuit. Grounding and short circuit is mandatory at the connection of cable and overhead line. . ESTW/ Castor Working Release The working location can be only released for working by the responsible, if Condution allowance (VE) exists All measures according DIN VDE 0105-100 have been carried out The responsible person of the switchgear has released the working allowance to the working responsible All persons, which are involved to the work, are instructed by the working responsible. The working release must be clearly formulated. Therefore a written form for the working release is mandatory for most distribution companies according the operation manual. (Contents: local conditions, grounding and protection measures, working distances, possible dangers) ESTW/ Castor Behaviour at the Working Location Activities can only be started, if the working responsible (AVO) has released the working location. The working responsible defines the scedule of work and coordinates the works of the workers in the plant. Hochspannung LEBENSGEFAHR ! Works should be only carried out, if a order exists. The necessary protection clothes have to be used! The working area should only be left via the defined exit! The 5 safety rules have to be kept under all conditions ! ESTW/ Castor Energizing after Termination of the Works Energizing must be carried out with the same accuracy as for the deenergizing before the works. Normally this will be done in the reverse order. It is very important to check the working location for tools or materials, which have been left, before removing the safety measures. Eventually, commissioning tests have to be carried out. Safety measures should be only removed, if all persons have left the danger area. Short circuit and grounding equipment should be removed at the working location at first and than at the other locations. First remove the short circuit and than the grounding! Then the siwitchgear has to be assumed to be under voltage ! ESTW/ Castor Energizing after Termination of the Work! ESTW/ Castor Change of Fuses Dangers during change of fuses: • Interruption under load => arcs • Change of fuses => weak protection against direct touch Loaded fuses should only be changed: Fuse load breaker • at circuits with low power • by using load breakers at first if available • for LV fuses with approbriate tools, handled by instructed persons or technicians. • Personal protection clothes (PSA) have to be used! DIN VDE 0105 - 100 ESTW/ Castor Personal Protection Equipment Die Safety association BGFE recommends the exchange of thermoplaqstic helments after 4 years and duroplastic helmets after 8 years Protection hand cuff Helment with face protection NSpg.-LiBo Heavy flammable clothes Isolating suit Safety shoed S2 or S3 ESTW/ Castor Switching with Second Person NO statement about no. Of persons in VDE 0105-100 and BGV A3 Exception: BGV A1 dangerous works (working under voltage) exceptionally – a dangerous has danger to be carried out by due to the „DangerousIf –works are works with a work higher potential one person, measures to be taken: process, the kind ofapprobriate work, the used have materials or the environmental conditions. other persons should be in visual distance A higher degreeof danger can patrols be caused by mechanical, electrical, chemical, regular control biological, thermal influencesystem or radiation.“ information in regular time steps All switching actions have to be carried out by two persons in switchgears with no protection against dangerous impacts of arc flash or electrical strike. ESTW/ Castor