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ELECTRICAL SYSTEM
The instructions contained in the "Electrical System" section must be supplied to a Company specializing
in electrical installations. These instructions are generally valid worldwide but may vary depending on
the Country of installation of SPIDER 300A, depending on the prescriptions of the electrical systems
used in their respective Countries.
Power: the receiver and the power supply box are equipped with a power supply unit that must be
connected to a power socket with the following characteristics:
- Worldwide (excluding USA and Canada): 230 V with Schuko socket or according to Country regulations.
The Schuko connector is included in the SPIDER 300A radio telescope.
- For USA and Canada: 115 V with AC outlet according to US standards.
Connection values: voltage variations over and above the normal levels compromise the proper
operation of the SPIDER 300A radio telescope. A voltage stabilizer should be used.
Rated voltage at 50 Hz ± 1 %
Max power absorption
Ups. If necessary, connect the plant to a UPS (UPS) unit with the following advices:
- for the sizing of the UPS, the behavior in case of short-circuit and overload of the UPS system should
also be considered.
- Overload capacity of the UPS system: ≥200% for 0.5 s.
Note: Sizing of the UPS must be absolutely defined by the supplier of the UPS!
Lightning protection. Due to the possible emission of radio waves and therefore the creation of strong
interference, a lightning arrestor system can not be installed near the SPIDER 300A radio telescope. The
lightning protection system therefore should provide:
Passive protection on the antenna + mount structure: the highest point of the radio telescope when
positioned in stow position is the one that covers the 2 LNAs and it's made of non-metallic material. In
the event of a lightning striking the SPIDER 300A radio telescope, the electric current could freely flow
through the entire structure and discharged to terrain. SPIDER 300A is provided with a special
connection point on the column to be connected to the ground sink that the customer has to put in place
according to the regulations in force in the Country of installation of the radio telescope.
Passive receiver protection: to prevent electric current from electrocution or electrostatic currents
reaching to the receiver located in the radio telescope control room, the SPIDER 300A is equipped with
special electrostatic voltage dischargers to be installed before the receiver: equipped with a special
socket, it must be connected to the ground system, allowing the discharge of any electric current
generated by the lightning strike before it reaches the receiver.
SPIDER 300A
230V
1000W
WHITE PAPER
v2.1 (upd 09/10/2020)
pag. 14
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