# CALCULATION EXAMPLE: FUNCTIONAL GROUNDING OF TELEVISION EQUIPMENT AT THE STADIUM

For uninterrupted broadcasting of events at stadiums, it is necessary to ensure the reliable operation of television equipment and to prevent surges and disturbance. A functional grounding device intended only for highly sensitive electronic devices will help to accomplish this task

В The ZANDZ Technical Center received a request to calculate such a grounding with a resistance of not more than 0.5 ohms. Let's consider what solution our experts offered.

Initial data:

- soil type - loam, sandy loam

- 2 platforms with the dimensions of 15x20 m are available.

Specific resistance of the soil used for calculations – 100 Ohm * m.

It is necessary to calculate grounding device with the resistance of not more than 0,5 Ohm..

Solution:

Installation of a grounding device, consisting of 191 vertical electrodes with a length of 1.5 m each, connected by a copper-bonded tape with the cross section of 30x4 mm in the form of a grounding mesh with a pitch of 1.5 m. Burial depth 0.5 - 0.7 meters.

Grounding device resistance calculation:

The rated resistance of the grounding device is 0.49 Ohms, which is less than the required value of 0.5 Ohms.

The design of the grounding device is shown in Figure 1.

The list of required material is given in Table 1.

Figure 1 - Location of equipment.

Вертикальный заземлитель – vertical ground electrode
Полоса стальная омедненная сечением – steel copper-bonded tape with the cross section of 30*4mm

Table 1 - List of material needs.

 № Fig. Product item Name Quantity, pcs. 1. ZZ-001-065 ZANDZ Copper-bonded threaded grounding rod (D14; 1.5 m) 191 2. ZZ-002-061 ZANDZ Threaded coupler 19 3. ZZ-003-061 ZANDZ Starting tip 191 4. ZZ-004-060 ZANDZ Driving head for a jackhammer 39 5. ZZ-005-064 ZANDZ Clamp for connecting conductor (up to 40 mm) 202 6. ZZ-007-030 ZANDZ Waterproof tape 50 7. ZZ-008-000 ZANDZ Header for a jackhammer (SDS max) 2 8. GL-11075-50 GALMAR Copper-bonded tape (30 * 4 mm / S 120 mm²; coil of 50 meters) 11

Do you have questions or you need to calculate a grounding device for sensitive electronics? Send your request to info@zandz.ru.